메타데이터
| 항목 |
값 |
| Designation |
P/2025 U1 (Hogan) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-03-25T17:36:04.040640Z |
| Orbit solution date (soln_date, UTC) |
2026-05-22T14:12:29Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-10-30T12:01:04.713600Z |
| Discovery magnitude (MPC) |
20.84 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2026-01-09.0000000 |
| e |
0.29436323 |
| q (au) |
4.165966 |
| a (au) |
5.903839 |
| i (deg) |
23.831475 |
| Ω (om, deg) |
234.958432 |
| ω (w, deg) |
263.994932 |
| M (ma, deg) |
354.796571 |
밝기
산란 + 전체 선형
$$
M_a = (10.342 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.342 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.700 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
09:41:35.25 |
-06:41:16.0 |
HIP 47561 |
5.66 |
| 2026-07-29 12:00 |
09:42:08.65 |
-06:43:22.5 |
HIP 47561 |
5.27 |
| 2026-07-30 00:00 |
09:42:42.07 |
-06:45:29.9 |
HIP 47687 |
11.45 |
| 2026-07-30 12:00 |
09:43:15.50 |
-06:47:38.2 |
HIP 47687 |
3.27 |
| 2026-07-31 00:00 |
09:43:48.96 |
-06:49:47.5 |
HIP 47687 |
6.10 |
| 2026-07-31 12:00 |
09:44:22.43 |
-06:51:57.7 |
HIP 47825 |
12.43 |
| 2026-08-01 00:00 |
09:44:55.91 |
-06:54:08.8 |
HIP 47825 |
11.95 |
| 2026-08-01 12:00 |
09:45:29.41 |
-06:56:20.7 |
HIP 47825 |
16.71 |
| 2026-08-02 00:00 |
09:46:02.93 |
-06:58:33.6 |
HIP 47977 |
13.92 |
| 2026-08-02 12:00 |
09:46:36.46 |
-07:00:47.4 |
HIP 47977 |
7.17 |
| 2026-08-03 00:00 |
09:47:10.01 |
-07:03:02.1 |
HIP 47977 |
7.57 |
| 2026-08-03 12:00 |
09:47:43.57 |
-07:05:17.7 |
HIP 48087 |
11.89 |
| 2026-08-04 00:00 |
09:48:17.15 |
-07:07:34.2 |
HIP 48087 |
7.26 |
| 2026-08-04 12:00 |
09:48:50.74 |
-07:09:51.6 |
HIP 48109 |
10.17 |
| 2026-08-05 00:00 |
09:49:24.34 |
-07:12:09.9 |
HIP 48109 |
14.36 |
| 2026-08-05 12:00 |
09:49:57.95 |
-07:14:29.0 |
HIP 48286 |
13.62 |
| 2026-08-06 00:00 |
09:50:31.58 |
-07:16:49.0 |
HIP 48286 |
6.55 |
| 2026-08-06 12:00 |
09:51:05.22 |
-07:19:09.9 |
HIP 48286 |
7.07 |
| 2026-08-07 00:00 |
09:51:38.86 |
-07:21:31.7 |
HIP 48286 |
14.40 |
| 2026-08-07 12:00 |
09:52:12.52 |
-07:23:54.4 |
HIP 48427 |
12.20 |
| 2026-08-08 00:00 |
09:52:46.19 |
-07:26:17.9 |
HIP 48427 |
11.53 |
| 2026-08-08 12:00 |
09:53:19.87 |
-07:28:42.2 |
HIP 48427 |
16.35 |
| 2026-08-09 00:00 |
09:53:53.56 |
-07:31:07.5 |
HIP 48651 |
22.63 |
| 2026-08-09 12:00 |
09:54:27.26 |
-07:33:33.6 |
HIP 48651 |
14.16 |
| 2026-08-10 00:00 |
09:55:00.96 |
-07:36:00.5 |
HIP 48651 |
6.33 |
| 2026-08-10 12:00 |
09:55:34.67 |
-07:38:28.3 |
HIP 48651 |
5.58 |
| 2026-08-11 00:00 |
09:56:08.39 |
-07:40:56.9 |
HIP 48712 |
2.23 |
| 2026-08-11 12:00 |
09:56:42.11 |
-07:43:26.4 |
HIP 48712 |
9.68 |
| 2026-08-12 00:00 |
09:57:15.84 |
-07:45:56.7 |
HIP 48712 |
18.29 |
| 2026-08-12 12:00 |
09:57:49.58 |
-07:48:27.8 |
HIP 48816 |
22.76 |
| 2026-08-13 00:00 |
09:58:23.32 |
-07:50:59.8 |
HIP 48978 |
17.36 |
| 2026-08-13 12:00 |
09:58:57.06 |
-07:53:32.6 |
HIP 48978 |
9.25 |
| 2026-08-14 00:00 |
09:59:30.81 |
-07:56:06.1 |
HIP 48978 |
4.75 |
| 2026-08-14 12:00 |
10:00:04.55 |
-07:58:40.5 |
HIP 48978 |
10.61 |
| 2026-08-15 00:00 |
10:00:38.30 |
-08:01:15.7 |
HIP 48978 |
18.86 |
| 2026-08-15 12:00 |
10:01:12.06 |
-08:03:51.7 |
HIP 48978 |
27.43 |
| 2026-08-16 00:00 |
10:01:45.81 |
-08:06:28.5 |
HIP 49210 |
27.34 |
| 2026-08-16 12:00 |
10:02:19.56 |
-08:09:06.1 |
HIP 49210 |
21.86 |
| 2026-08-17 00:00 |
10:02:53.31 |
-08:11:44.4 |
HIP 49305 |
18.07 |
| 2026-08-17 12:00 |
10:03:27.06 |
-08:14:23.6 |
HIP 49305 |
10.43 |
| 2026-08-18 00:00 |
10:04:00.81 |
-08:17:03.5 |
HIP 49305 |
6.65 |
| 2026-08-18 12:00 |
10:04:34.56 |
-08:19:44.1 |
HIP 49305 |
11.55 |
| 2026-08-19 00:00 |
10:05:08.31 |
-08:22:25.5 |
HIP 49305 |
19.39 |