메타데이터
| 항목 |
값 |
| Designation |
C/2022 Y1 (Hogan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-11-27T05:12:59.653440Z |
| Orbit solution date (soln_date, UTC) |
2023-06-01T23:12:56Z |
| Obs used |
117 |
| NEO |
- |
| M1 |
13.300 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-12-17T10:28:21.676800Z |
| Discovery magnitude (MPC) |
19.72 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-01-04.0000000 |
| e |
0.76423431 |
| q (au) |
2.957709 |
| a (au) |
12.545122 |
| i (deg) |
18.858872 |
| Ω (om, deg) |
285.915047 |
| ω (w, deg) |
174.737499 |
| M (ma, deg) |
0.838077 |
밝기
산란 + 전체 선형
$$
M_a = (18.661 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.661 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.739 |
| 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) |
| 2026-03-26 00:00 |
14:43:00.53 |
-34:55:01.8 |
HIP 72010 |
17.31 |
| 2026-03-26 12:00 |
14:42:51.54 |
-34:55:03.2 |
HIP 72010 |
18.21 |
| 2026-03-27 00:00 |
14:42:42.46 |
-34:55:03.8 |
HIP 72010 |
19.27 |
| 2026-03-27 12:00 |
14:42:33.27 |
-34:55:03.5 |
HIP 72010 |
20.46 |
| 2026-03-28 00:00 |
14:42:24.00 |
-34:55:02.3 |
HIP 72010 |
21.78 |
| 2026-03-28 12:00 |
14:42:14.64 |
-34:55:00.3 |
HIP 71804 |
21.73 |
| 2026-03-29 00:00 |
14:42:05.18 |
-34:54:57.5 |
HIP 71804 |
20.70 |
| 2026-03-29 12:00 |
14:41:55.63 |
-34:54:53.7 |
HIP 71804 |
19.78 |
| 2026-03-30 00:00 |
14:41:46.00 |
-34:54:49.1 |
HIP 71804 |
19.00 |
| 2026-03-30 12:00 |
14:41:36.28 |
-34:54:43.7 |
HIP 71804 |
18.38 |
| 2026-03-31 00:00 |
14:41:26.47 |
-34:54:37.4 |
HIP 71804 |
17.95 |
| 2026-03-31 12:00 |
14:41:16.58 |
-34:54:30.2 |
HIP 71804 |
17.73 |
| 2026-04-01 00:00 |
14:41:06.61 |
-34:54:22.2 |
HIP 71804 |
17.72 |
| 2026-04-01 12:00 |
14:40:56.55 |
-34:54:13.3 |
HIP 71804 |
17.94 |
| 2026-04-02 00:00 |
14:40:46.41 |
-34:54:03.5 |
HIP 71804 |
18.39 |
| 2026-04-02 12:00 |
14:40:36.20 |
-34:53:52.9 |
HIP 71642 |
17.63 |
| 2026-04-03 00:00 |
14:40:25.90 |
-34:53:41.4 |
HIP 71642 |
15.59 |
| 2026-04-03 12:00 |
14:40:15.53 |
-34:53:29.0 |
HIP 71642 |
13.56 |
| 2026-04-04 00:00 |
14:40:05.09 |
-34:53:15.8 |
HIP 71642 |
11.55 |
| 2026-04-04 12:00 |
14:39:54.56 |
-34:53:01.7 |
HIP 71642 |
9.57 |
| 2026-04-05 00:00 |
14:39:43.97 |
-34:52:46.7 |
HIP 71642 |
7.68 |
| 2026-04-05 12:00 |
14:39:33.30 |
-34:52:30.9 |
HIP 71642 |
5.97 |
| 2026-04-06 00:00 |
14:39:22.57 |
-34:52:14.2 |
HIP 71642 |
4.68 |
| 2026-04-06 12:00 |
14:39:11.76 |
-34:51:56.7 |
HIP 71642 |
4.24 |
| 2026-04-07 00:00 |
14:39:00.89 |
-34:51:38.3 |
HIP 71642 |
4.90 |
| 2026-04-07 12:00 |
14:38:49.95 |
-34:51:19.0 |
HIP 71642 |
6.34 |
| 2026-04-08 00:00 |
14:38:38.94 |
-34:50:58.8 |
HIP 71642 |
8.17 |
| 2026-04-08 12:00 |
14:38:27.88 |
-34:50:37.8 |
HIP 71642 |
10.20 |
| 2026-04-09 00:00 |
14:38:16.75 |
-34:50:15.9 |
HIP 71642 |
12.33 |
| 2026-04-09 12:00 |
14:38:05.56 |
-34:49:53.2 |
HIP 71642 |
14.52 |
| 2026-04-10 00:00 |
14:37:54.31 |
-34:49:29.6 |
HIP 71642 |
16.77 |
| 2026-04-10 12:00 |
14:37:43.00 |
-34:49:05.1 |
HIP 71642 |
19.05 |
| 2026-04-11 00:00 |
14:37:31.64 |
-34:48:39.8 |
HIP 71405 |
18.34 |
| 2026-04-11 12:00 |
14:37:20.22 |
-34:48:13.6 |
HIP 71405 |
16.29 |
| 2026-04-12 00:00 |
14:37:08.75 |
-34:47:46.6 |
HIP 71405 |
14.34 |
| 2026-04-12 12:00 |
14:36:57.22 |
-34:47:18.7 |
HIP 71405 |
12.54 |
| 2026-04-13 00:00 |
14:36:45.65 |
-34:46:50.0 |
HIP 71405 |
10.99 |
| 2026-04-13 12:00 |
14:36:34.03 |
-34:46:20.4 |
HIP 71384 |
9.28 |
| 2026-04-14 00:00 |
14:36:22.36 |
-34:45:50.0 |
HIP 71384 |
7.22 |
| 2026-04-14 12:00 |
14:36:10.65 |
-34:45:18.7 |
HIP 71384 |
5.50 |
| 2026-04-15 00:00 |
14:35:58.89 |
-34:44:46.6 |
HIP 71384 |
4.54 |
| 2026-04-15 12:00 |
14:35:47.09 |
-34:44:13.6 |
HIP 71384 |
4.83 |
| 2026-04-16 00:00 |
14:35:35.25 |
-34:43:39.8 |
HIP 71384 |
6.21 |