Table 1.

Median observational parameters of the Big Structures recovered in the OSFC with the 16th and 84th percentiles. The cluster number is used for identification in Fig. 4. |$N_T$| corresponds to the total number of stars from the main sample and with radial velocity in parenthesis. The last column shows the references that have studied the clusters using Gaia data.

ClusterName|$\bar{\alpha }$||$\bar{\delta }$||$\bar{\varpi }$||$\bar{\mu }_\alpha ^{ *}$||$\bar{\mu }_\delta$||$\overline{RV}$||$N_T$|References
(deg)(deg)(mas)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {km}\ s^{-1}$|⁠)(with RV)
1|$\lambda$| Ori83.75|$^{+1.19}_{-1.01}$|9.83|$^{+1.26}_{-0.72}$|2.55|$^{+0.08}_{-0.07}$|1.25|$^{+0.59}_{-0.59}$||$-2.12^{+0.40}_{-0.33}$|27.26|$^{+2.64}_{-1.63}$|773 (250)1, 2, 3
2Ori-Northa82.39|$^{+1.21}_{-0.71}$|2.09|$^{+1.89}_{-1.05}$|2.62|$^{+0.17}_{-0.24}$||$-0.67^{+0.33}_{-0.34}$|0.73|$^{+0.27}_{-0.29}$|30.63|$^{+2.24}_{-1.70}$|305 (59)2, 3, 4
3Briceño-1Ab82.34|$^{+0.28}_{-0.41}$|3.43|$^{+0.36}_{-0.92}$|2.94|$^{+0.03}_{-0.04}$|1.53|$^{+0.18}_{-0.20}$||$-0.59^{+0.17}_{-0.15}$|20.35|$^{+2.07}_{-2.67}$|175 (36)2, 3
4Briceño-1Bb81.13|$^{+0.44}_{-0.34}$|1.62|$^{+0.29}_{-0.61}$|2.93|$^{+0.06}_{-0.05}$|1.38|$^{+0.23}_{-0.17}$||$-0.03^{+0.15}_{-0.19}$|20.83|$^{+1.22}_{-1.40}$|237 (55)2, 3
5Ori-East86.54|$^{+0.25}_{-0.50}$|0.13|$^{+0.49}_{-0.44}$|2.47|$^{+0.05}_{-0.05}$||$-0.72^{+0.94}_{-0.58}$||$-0.83^{+0.53}_{-0.44}$|28.11|$^{+1.93}_{-1.42}$|144 (65)1, 2
6OBP-Far83.96|$^{+0.56}_{-0.45}$||$-1.85^{+0.98}_{-2.89}$|2.41|$^{+0.06}_{-0.06}$||$-1.40^{+0.51}_{-0.41}$|1.03|$^{+0.36}_{-0.47}$|30.52|$^{+3.05}_{-1.82}$|223 (31)2
7|$\sigma$| Ori84.78|$^{+0.31}_{-0.23}$||$-2.55^{+0.37}_{-0.19}$|2.54|$^{+0.06}_{-0.06}$|1.46|$^{+0.64}_{-0.39}$||$-0.47^{+0.53}_{-0.43}$|30.84|$^{+1.45}_{-1.98}$|207 (110)1, 2
8OBP-b84.00|$^{+0.45}_{-0.54}$||$-0.85^{+0.53}_{-0.90}$|2.61|$^{+0.11}_{-0.14}$||$-1.02^{+0.35}_{-0.27}$||$-0.64^{+0.27}_{-0.20}$|31.12|$^{+4.04}_{-5.40}$|196 (31)2, 3
9OBP-d83.15|$^{+0.32}_{-0.41}$||$-1.65^{+0.63}_{-0.40}$|2.45|$^{+0.07}_{-0.05}$|0.08|$^{+0.39}_{-0.24}$||$-0.21^{+0.31}_{-0.26}$|30.84|$^{+1.04}_{-1.00}$|301 (58)2, 3
10OBP-Near83.55|$^{+1.20}_{-1.53}$||$-1.77^{+1.07}_{-0.69}$|2.83|$^{+0.08}_{-0.07}$|1.61|$^{+0.28}_{-0.43}$||$-1.24^{+0.24}_{-0.23}$|22.77|$^{+2.06}_{-2.57}$|534 (133)2, 3
11ONC83.82|$^{+0.25}_{-0.30}$||$-5.58^{+0.75}_{-0.84}$|2.62|$^{+0.08}_{-0.08}$|1.16|$^{+0.38}_{-0.44}$|0.28|$^{+0.49}_{-0.74}$|26.98|$^{+3.53}_{-2.55}$|1816 (828)1, 2, 3
12Ori-Southc85.62|$^{+0.27}_{-0.33}$||$-8.40^{+0.48}_{-1.19}$|2.38|$^{+0.07}_{-0.11}$|0.33|$^{+0.38}_{-0.37}$||$-0.57^{+0.54}_{-0.70}$|21.44|$^{+1.80}_{-1.95}$|331 (117)2, 3
13Orion Y87.84|$^{+0.70}_{-1.44}$||$-7.59^{+0.70}_{-1.82}$|3.38|$^{+0.14}_{-0.09}$|0.14|$^{+0.32}_{-0.32}$||$-0.57^{+0.24}_{-0.24}$|16.38|$^{+2.42}_{-0.11}$|189 (3)1, 2, 3N
ClusterName|$\bar{\alpha }$||$\bar{\delta }$||$\bar{\varpi }$||$\bar{\mu }_\alpha ^{ *}$||$\bar{\mu }_\delta$||$\overline{RV}$||$N_T$|References
(deg)(deg)(mas)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {km}\ s^{-1}$|⁠)(with RV)
1|$\lambda$| Ori83.75|$^{+1.19}_{-1.01}$|9.83|$^{+1.26}_{-0.72}$|2.55|$^{+0.08}_{-0.07}$|1.25|$^{+0.59}_{-0.59}$||$-2.12^{+0.40}_{-0.33}$|27.26|$^{+2.64}_{-1.63}$|773 (250)1, 2, 3
2Ori-Northa82.39|$^{+1.21}_{-0.71}$|2.09|$^{+1.89}_{-1.05}$|2.62|$^{+0.17}_{-0.24}$||$-0.67^{+0.33}_{-0.34}$|0.73|$^{+0.27}_{-0.29}$|30.63|$^{+2.24}_{-1.70}$|305 (59)2, 3, 4
3Briceño-1Ab82.34|$^{+0.28}_{-0.41}$|3.43|$^{+0.36}_{-0.92}$|2.94|$^{+0.03}_{-0.04}$|1.53|$^{+0.18}_{-0.20}$||$-0.59^{+0.17}_{-0.15}$|20.35|$^{+2.07}_{-2.67}$|175 (36)2, 3
4Briceño-1Bb81.13|$^{+0.44}_{-0.34}$|1.62|$^{+0.29}_{-0.61}$|2.93|$^{+0.06}_{-0.05}$|1.38|$^{+0.23}_{-0.17}$||$-0.03^{+0.15}_{-0.19}$|20.83|$^{+1.22}_{-1.40}$|237 (55)2, 3
5Ori-East86.54|$^{+0.25}_{-0.50}$|0.13|$^{+0.49}_{-0.44}$|2.47|$^{+0.05}_{-0.05}$||$-0.72^{+0.94}_{-0.58}$||$-0.83^{+0.53}_{-0.44}$|28.11|$^{+1.93}_{-1.42}$|144 (65)1, 2
6OBP-Far83.96|$^{+0.56}_{-0.45}$||$-1.85^{+0.98}_{-2.89}$|2.41|$^{+0.06}_{-0.06}$||$-1.40^{+0.51}_{-0.41}$|1.03|$^{+0.36}_{-0.47}$|30.52|$^{+3.05}_{-1.82}$|223 (31)2
7|$\sigma$| Ori84.78|$^{+0.31}_{-0.23}$||$-2.55^{+0.37}_{-0.19}$|2.54|$^{+0.06}_{-0.06}$|1.46|$^{+0.64}_{-0.39}$||$-0.47^{+0.53}_{-0.43}$|30.84|$^{+1.45}_{-1.98}$|207 (110)1, 2
8OBP-b84.00|$^{+0.45}_{-0.54}$||$-0.85^{+0.53}_{-0.90}$|2.61|$^{+0.11}_{-0.14}$||$-1.02^{+0.35}_{-0.27}$||$-0.64^{+0.27}_{-0.20}$|31.12|$^{+4.04}_{-5.40}$|196 (31)2, 3
9OBP-d83.15|$^{+0.32}_{-0.41}$||$-1.65^{+0.63}_{-0.40}$|2.45|$^{+0.07}_{-0.05}$|0.08|$^{+0.39}_{-0.24}$||$-0.21^{+0.31}_{-0.26}$|30.84|$^{+1.04}_{-1.00}$|301 (58)2, 3
10OBP-Near83.55|$^{+1.20}_{-1.53}$||$-1.77^{+1.07}_{-0.69}$|2.83|$^{+0.08}_{-0.07}$|1.61|$^{+0.28}_{-0.43}$||$-1.24^{+0.24}_{-0.23}$|22.77|$^{+2.06}_{-2.57}$|534 (133)2, 3
11ONC83.82|$^{+0.25}_{-0.30}$||$-5.58^{+0.75}_{-0.84}$|2.62|$^{+0.08}_{-0.08}$|1.16|$^{+0.38}_{-0.44}$|0.28|$^{+0.49}_{-0.74}$|26.98|$^{+3.53}_{-2.55}$|1816 (828)1, 2, 3
12Ori-Southc85.62|$^{+0.27}_{-0.33}$||$-8.40^{+0.48}_{-1.19}$|2.38|$^{+0.07}_{-0.11}$|0.33|$^{+0.38}_{-0.37}$||$-0.57^{+0.54}_{-0.70}$|21.44|$^{+1.80}_{-1.95}$|331 (117)2, 3
13Orion Y87.84|$^{+0.70}_{-1.44}$||$-7.59^{+0.70}_{-1.82}$|3.38|$^{+0.14}_{-0.09}$|0.14|$^{+0.32}_{-0.32}$||$-0.57^{+0.24}_{-0.24}$|16.38|$^{+2.42}_{-0.11}$|189 (3)1, 2, 3N

Notes. aOri-North is composed by two sub-structures ω-Ori and ASCC 20 as seen in Section 5.2.

b

Briceño-1A and Briceño-1B were identified as a unique structure by Chen et al. (2020) under the name Briceño-1.

c

Ori-South is composed by two sub-structures: L1641S and L1647 as seen in Section 5.2.

References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021), (4) Kos et al. (2019).

Table 1.

Median observational parameters of the Big Structures recovered in the OSFC with the 16th and 84th percentiles. The cluster number is used for identification in Fig. 4. |$N_T$| corresponds to the total number of stars from the main sample and with radial velocity in parenthesis. The last column shows the references that have studied the clusters using Gaia data.

ClusterName|$\bar{\alpha }$||$\bar{\delta }$||$\bar{\varpi }$||$\bar{\mu }_\alpha ^{ *}$||$\bar{\mu }_\delta$||$\overline{RV}$||$N_T$|References
(deg)(deg)(mas)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {km}\ s^{-1}$|⁠)(with RV)
1|$\lambda$| Ori83.75|$^{+1.19}_{-1.01}$|9.83|$^{+1.26}_{-0.72}$|2.55|$^{+0.08}_{-0.07}$|1.25|$^{+0.59}_{-0.59}$||$-2.12^{+0.40}_{-0.33}$|27.26|$^{+2.64}_{-1.63}$|773 (250)1, 2, 3
2Ori-Northa82.39|$^{+1.21}_{-0.71}$|2.09|$^{+1.89}_{-1.05}$|2.62|$^{+0.17}_{-0.24}$||$-0.67^{+0.33}_{-0.34}$|0.73|$^{+0.27}_{-0.29}$|30.63|$^{+2.24}_{-1.70}$|305 (59)2, 3, 4
3Briceño-1Ab82.34|$^{+0.28}_{-0.41}$|3.43|$^{+0.36}_{-0.92}$|2.94|$^{+0.03}_{-0.04}$|1.53|$^{+0.18}_{-0.20}$||$-0.59^{+0.17}_{-0.15}$|20.35|$^{+2.07}_{-2.67}$|175 (36)2, 3
4Briceño-1Bb81.13|$^{+0.44}_{-0.34}$|1.62|$^{+0.29}_{-0.61}$|2.93|$^{+0.06}_{-0.05}$|1.38|$^{+0.23}_{-0.17}$||$-0.03^{+0.15}_{-0.19}$|20.83|$^{+1.22}_{-1.40}$|237 (55)2, 3
5Ori-East86.54|$^{+0.25}_{-0.50}$|0.13|$^{+0.49}_{-0.44}$|2.47|$^{+0.05}_{-0.05}$||$-0.72^{+0.94}_{-0.58}$||$-0.83^{+0.53}_{-0.44}$|28.11|$^{+1.93}_{-1.42}$|144 (65)1, 2
6OBP-Far83.96|$^{+0.56}_{-0.45}$||$-1.85^{+0.98}_{-2.89}$|2.41|$^{+0.06}_{-0.06}$||$-1.40^{+0.51}_{-0.41}$|1.03|$^{+0.36}_{-0.47}$|30.52|$^{+3.05}_{-1.82}$|223 (31)2
7|$\sigma$| Ori84.78|$^{+0.31}_{-0.23}$||$-2.55^{+0.37}_{-0.19}$|2.54|$^{+0.06}_{-0.06}$|1.46|$^{+0.64}_{-0.39}$||$-0.47^{+0.53}_{-0.43}$|30.84|$^{+1.45}_{-1.98}$|207 (110)1, 2
8OBP-b84.00|$^{+0.45}_{-0.54}$||$-0.85^{+0.53}_{-0.90}$|2.61|$^{+0.11}_{-0.14}$||$-1.02^{+0.35}_{-0.27}$||$-0.64^{+0.27}_{-0.20}$|31.12|$^{+4.04}_{-5.40}$|196 (31)2, 3
9OBP-d83.15|$^{+0.32}_{-0.41}$||$-1.65^{+0.63}_{-0.40}$|2.45|$^{+0.07}_{-0.05}$|0.08|$^{+0.39}_{-0.24}$||$-0.21^{+0.31}_{-0.26}$|30.84|$^{+1.04}_{-1.00}$|301 (58)2, 3
10OBP-Near83.55|$^{+1.20}_{-1.53}$||$-1.77^{+1.07}_{-0.69}$|2.83|$^{+0.08}_{-0.07}$|1.61|$^{+0.28}_{-0.43}$||$-1.24^{+0.24}_{-0.23}$|22.77|$^{+2.06}_{-2.57}$|534 (133)2, 3
11ONC83.82|$^{+0.25}_{-0.30}$||$-5.58^{+0.75}_{-0.84}$|2.62|$^{+0.08}_{-0.08}$|1.16|$^{+0.38}_{-0.44}$|0.28|$^{+0.49}_{-0.74}$|26.98|$^{+3.53}_{-2.55}$|1816 (828)1, 2, 3
12Ori-Southc85.62|$^{+0.27}_{-0.33}$||$-8.40^{+0.48}_{-1.19}$|2.38|$^{+0.07}_{-0.11}$|0.33|$^{+0.38}_{-0.37}$||$-0.57^{+0.54}_{-0.70}$|21.44|$^{+1.80}_{-1.95}$|331 (117)2, 3
13Orion Y87.84|$^{+0.70}_{-1.44}$||$-7.59^{+0.70}_{-1.82}$|3.38|$^{+0.14}_{-0.09}$|0.14|$^{+0.32}_{-0.32}$||$-0.57^{+0.24}_{-0.24}$|16.38|$^{+2.42}_{-0.11}$|189 (3)1, 2, 3N
ClusterName|$\bar{\alpha }$||$\bar{\delta }$||$\bar{\varpi }$||$\bar{\mu }_\alpha ^{ *}$||$\bar{\mu }_\delta$||$\overline{RV}$||$N_T$|References
(deg)(deg)(mas)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {mas}\ yr^{-1}$|⁠)(⁠|$\rm {km}\ s^{-1}$|⁠)(with RV)
1|$\lambda$| Ori83.75|$^{+1.19}_{-1.01}$|9.83|$^{+1.26}_{-0.72}$|2.55|$^{+0.08}_{-0.07}$|1.25|$^{+0.59}_{-0.59}$||$-2.12^{+0.40}_{-0.33}$|27.26|$^{+2.64}_{-1.63}$|773 (250)1, 2, 3
2Ori-Northa82.39|$^{+1.21}_{-0.71}$|2.09|$^{+1.89}_{-1.05}$|2.62|$^{+0.17}_{-0.24}$||$-0.67^{+0.33}_{-0.34}$|0.73|$^{+0.27}_{-0.29}$|30.63|$^{+2.24}_{-1.70}$|305 (59)2, 3, 4
3Briceño-1Ab82.34|$^{+0.28}_{-0.41}$|3.43|$^{+0.36}_{-0.92}$|2.94|$^{+0.03}_{-0.04}$|1.53|$^{+0.18}_{-0.20}$||$-0.59^{+0.17}_{-0.15}$|20.35|$^{+2.07}_{-2.67}$|175 (36)2, 3
4Briceño-1Bb81.13|$^{+0.44}_{-0.34}$|1.62|$^{+0.29}_{-0.61}$|2.93|$^{+0.06}_{-0.05}$|1.38|$^{+0.23}_{-0.17}$||$-0.03^{+0.15}_{-0.19}$|20.83|$^{+1.22}_{-1.40}$|237 (55)2, 3
5Ori-East86.54|$^{+0.25}_{-0.50}$|0.13|$^{+0.49}_{-0.44}$|2.47|$^{+0.05}_{-0.05}$||$-0.72^{+0.94}_{-0.58}$||$-0.83^{+0.53}_{-0.44}$|28.11|$^{+1.93}_{-1.42}$|144 (65)1, 2
6OBP-Far83.96|$^{+0.56}_{-0.45}$||$-1.85^{+0.98}_{-2.89}$|2.41|$^{+0.06}_{-0.06}$||$-1.40^{+0.51}_{-0.41}$|1.03|$^{+0.36}_{-0.47}$|30.52|$^{+3.05}_{-1.82}$|223 (31)2
7|$\sigma$| Ori84.78|$^{+0.31}_{-0.23}$||$-2.55^{+0.37}_{-0.19}$|2.54|$^{+0.06}_{-0.06}$|1.46|$^{+0.64}_{-0.39}$||$-0.47^{+0.53}_{-0.43}$|30.84|$^{+1.45}_{-1.98}$|207 (110)1, 2
8OBP-b84.00|$^{+0.45}_{-0.54}$||$-0.85^{+0.53}_{-0.90}$|2.61|$^{+0.11}_{-0.14}$||$-1.02^{+0.35}_{-0.27}$||$-0.64^{+0.27}_{-0.20}$|31.12|$^{+4.04}_{-5.40}$|196 (31)2, 3
9OBP-d83.15|$^{+0.32}_{-0.41}$||$-1.65^{+0.63}_{-0.40}$|2.45|$^{+0.07}_{-0.05}$|0.08|$^{+0.39}_{-0.24}$||$-0.21^{+0.31}_{-0.26}$|30.84|$^{+1.04}_{-1.00}$|301 (58)2, 3
10OBP-Near83.55|$^{+1.20}_{-1.53}$||$-1.77^{+1.07}_{-0.69}$|2.83|$^{+0.08}_{-0.07}$|1.61|$^{+0.28}_{-0.43}$||$-1.24^{+0.24}_{-0.23}$|22.77|$^{+2.06}_{-2.57}$|534 (133)2, 3
11ONC83.82|$^{+0.25}_{-0.30}$||$-5.58^{+0.75}_{-0.84}$|2.62|$^{+0.08}_{-0.08}$|1.16|$^{+0.38}_{-0.44}$|0.28|$^{+0.49}_{-0.74}$|26.98|$^{+3.53}_{-2.55}$|1816 (828)1, 2, 3
12Ori-Southc85.62|$^{+0.27}_{-0.33}$||$-8.40^{+0.48}_{-1.19}$|2.38|$^{+0.07}_{-0.11}$|0.33|$^{+0.38}_{-0.37}$||$-0.57^{+0.54}_{-0.70}$|21.44|$^{+1.80}_{-1.95}$|331 (117)2, 3
13Orion Y87.84|$^{+0.70}_{-1.44}$||$-7.59^{+0.70}_{-1.82}$|3.38|$^{+0.14}_{-0.09}$|0.14|$^{+0.32}_{-0.32}$||$-0.57^{+0.24}_{-0.24}$|16.38|$^{+2.42}_{-0.11}$|189 (3)1, 2, 3N

Notes. aOri-North is composed by two sub-structures ω-Ori and ASCC 20 as seen in Section 5.2.

b

Briceño-1A and Briceño-1B were identified as a unique structure by Chen et al. (2020) under the name Briceño-1.

c

Ori-South is composed by two sub-structures: L1641S and L1647 as seen in Section 5.2.

References: (1) Kounkel et al. (2018), (2) Chen et al. (2020), (3) Swiggum et al. (2021), (4) Kos et al. (2019).

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