메타데이터
| 항목 |
값 |
| Designation |
P/2020 X1 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-07-20T02:53:09.418560Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T14:26:07Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
21.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-12-04T10:41:02.601600Z |
| Discovery magnitude (MPC) |
18.92 o |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-01-23.0000000 |
| e |
0.36528017 |
| q (au) |
2.871814 |
| a (au) |
4.524538 |
| i (deg) |
31.703026 |
| Ω (om, deg) |
56.028268 |
| ω (w, deg) |
323.208571 |
| M (ma, deg) |
19.138368 |
밝기
산란 + 전체 선형
$$
M_a = (15.087 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.087 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:18:23.78 |
-06:14:57.4 |
HIP 69875 |
17.94 |
| 2026-07-29 12:00 |
14:18:27.67 |
-06:16:50.2 |
HIP 69875 |
20.05 |
| 2026-07-30 00:00 |
14:18:31.71 |
-06:18:43.6 |
HIP 69962 |
18.64 |
| 2026-07-30 12:00 |
14:18:35.90 |
-06:20:37.5 |
HIP 69962 |
16.50 |
| 2026-07-31 00:00 |
14:18:40.24 |
-06:22:32.0 |
HIP 69962 |
14.34 |
| 2026-07-31 12:00 |
14:18:44.72 |
-06:24:26.9 |
HIP 69962 |
12.18 |
| 2026-08-01 00:00 |
14:18:49.36 |
-06:26:22.4 |
HIP 69962 |
10.03 |
| 2026-08-01 12:00 |
14:18:54.13 |
-06:28:18.4 |
HIP 69962 |
7.92 |
| 2026-08-02 00:00 |
14:18:59.06 |
-06:30:14.8 |
HIP 69962 |
5.91 |
| 2026-08-02 12:00 |
14:19:04.13 |
-06:32:11.8 |
HIP 69962 |
4.22 |
| 2026-08-03 00:00 |
14:19:09.34 |
-06:34:09.3 |
HIP 69962 |
3.40 |
| 2026-08-03 12:00 |
14:19:14.70 |
-06:36:07.3 |
HIP 69962 |
4.08 |
| 2026-08-04 00:00 |
14:19:20.20 |
-06:38:05.7 |
HIP 69962 |
5.78 |
| 2026-08-04 12:00 |
14:19:25.85 |
-06:40:04.7 |
HIP 69962 |
7.89 |
| 2026-08-05 00:00 |
14:19:31.64 |
-06:42:04.1 |
HIP 70038 |
6.01 |
| 2026-08-05 12:00 |
14:19:37.57 |
-06:44:04.0 |
HIP 70038 |
3.96 |
| 2026-08-06 00:00 |
14:19:43.65 |
-06:46:04.3 |
HIP 70038 |
2.72 |
| 2026-08-06 12:00 |
14:19:49.86 |
-06:48:05.2 |
HIP 70038 |
3.42 |
| 2026-08-07 00:00 |
14:19:56.22 |
-06:50:06.5 |
HIP 70038 |
5.39 |
| 2026-08-07 12:00 |
14:20:02.72 |
-06:52:08.2 |
HIP 70038 |
7.74 |
| 2026-08-08 00:00 |
14:20:09.36 |
-06:54:10.4 |
HIP 70038 |
10.22 |
| 2026-08-08 12:00 |
14:20:16.14 |
-06:56:13.1 |
HIP 70038 |
12.78 |
| 2026-08-09 00:00 |
14:20:23.06 |
-06:58:16.2 |
HIP 70038 |
15.40 |
| 2026-08-09 12:00 |
14:20:30.12 |
-07:00:19.8 |
HIP 70038 |
18.05 |
| 2026-08-10 00:00 |
14:20:37.32 |
-07:02:23.7 |
HIP 70038 |
20.75 |
| 2026-08-10 12:00 |
14:20:44.65 |
-07:04:28.2 |
HIP 70038 |
23.47 |
| 2026-08-11 00:00 |
14:20:52.13 |
-07:06:33.0 |
HIP 70038 |
26.23 |
| 2026-08-11 12:00 |
14:20:59.74 |
-07:08:38.3 |
HIP 70038 |
29.02 |
| 2026-08-12 00:00 |
14:21:07.48 |
-07:10:44.0 |
HIP 70038 |
31.84 |
| 2026-08-12 12:00 |
14:21:15.37 |
-07:12:50.1 |
HIP 70256 |
30.14 |
| 2026-08-13 00:00 |
14:21:23.38 |
-07:14:56.6 |
HIP 70256 |
27.26 |
| 2026-08-13 12:00 |
14:21:31.54 |
-07:17:03.6 |
HIP 70256 |
24.35 |
| 2026-08-14 00:00 |
14:21:39.82 |
-07:19:10.9 |
HIP 70256 |
21.42 |
| 2026-08-14 12:00 |
14:21:48.24 |
-07:21:18.6 |
HIP 70256 |
18.48 |
| 2026-08-15 00:00 |
14:21:56.79 |
-07:23:26.7 |
HIP 70256 |
15.53 |
| 2026-08-15 12:00 |
14:22:05.48 |
-07:25:35.2 |
HIP 70256 |
12.58 |
| 2026-08-16 00:00 |
14:22:14.29 |
-07:27:44.0 |
HIP 70256 |
9.67 |
| 2026-08-16 12:00 |
14:22:23.24 |
-07:29:53.3 |
HIP 70256 |
6.89 |
| 2026-08-17 00:00 |
14:22:32.31 |
-07:32:02.9 |
HIP 70256 |
4.51 |
| 2026-08-17 12:00 |
14:22:41.52 |
-07:34:12.9 |
HIP 70256 |
3.58 |
| 2026-08-18 00:00 |
14:22:50.85 |
-07:36:23.2 |
HIP 70256 |
5.04 |
| 2026-08-18 12:00 |
14:23:00.31 |
-07:38:33.9 |
HIP 70256 |
7.66 |
| 2026-08-19 00:00 |
14:23:09.89 |
-07:40:44.9 |
HIP 70269 |
9.39 |