메타데이터
| 항목 |
값 |
| Designation |
77P/Longmore |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-05-14T10:40:08.040000Z |
| Orbit solution date (soln_date, UTC) |
2025-10-29T22:11:34Z |
| Obs used |
2629 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-02-05.0000000 |
| e |
0.35416745 |
| q (au) |
2.333302 |
| a (au) |
3.612860 |
| i (deg) |
24.340171 |
| Ω (om, deg) |
14.886903 |
| ω (w, deg) |
196.946173 |
| M (ma, deg) |
240.954013 |
밝기
산란 + 전체 선형
$$
M_a = (8.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.016 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.866 |
| k |
1.000 |
| 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 |
00:57:21.92 |
+07:38:08.2 |
HIP 4447 |
8.44 |
| 2026-03-26 12:00 |
00:57:45.75 |
+07:41:24.9 |
HIP 4526 |
5.67 |
| 2026-03-27 00:00 |
00:58:09.60 |
+07:44:41.5 |
HIP 4526 |
8.46 |
| 2026-03-27 12:00 |
00:58:33.47 |
+07:47:58.2 |
HIP 4601 |
7.88 |
| 2026-03-28 00:00 |
00:58:57.36 |
+07:51:14.9 |
HIP 4601 |
8.09 |
| 2026-03-28 12:00 |
00:59:21.26 |
+07:54:31.6 |
HIP 4601 |
12.67 |
| 2026-03-29 00:00 |
00:59:45.17 |
+07:57:48.4 |
HIP 4601 |
18.63 |
| 2026-03-29 12:00 |
01:00:09.10 |
+08:01:05.1 |
HIP 4763 |
15.54 |
| 2026-03-30 00:00 |
01:00:33.05 |
+08:04:21.9 |
HIP 4763 |
9.86 |
| 2026-03-30 12:00 |
01:00:57.01 |
+08:07:38.6 |
HIP 4763 |
6.69 |
| 2026-03-31 00:00 |
01:01:20.98 |
+08:10:55.3 |
HIP 4763 |
9.17 |
| 2026-03-31 12:00 |
01:01:44.96 |
+08:14:12.1 |
HIP 4778 |
13.93 |
| 2026-04-01 00:00 |
01:02:08.96 |
+08:17:28.8 |
HIP 4778 |
14.83 |
| 2026-04-01 12:00 |
01:02:32.97 |
+08:20:45.5 |
HIP 4778 |
18.38 |
| 2026-04-02 00:00 |
01:02:56.99 |
+08:24:02.3 |
HIP 4778 |
23.41 |
| 2026-04-02 12:00 |
01:03:21.02 |
+08:27:19.0 |
HIP 4858 |
25.38 |
| 2026-04-03 00:00 |
01:03:45.05 |
+08:30:35.6 |
HIP 4858 |
26.40 |
| 2026-04-03 12:00 |
01:04:09.10 |
+08:33:52.3 |
HIP 5103 |
23.21 |
| 2026-04-04 00:00 |
01:04:33.16 |
+08:37:09.0 |
HIP 5103 |
21.34 |
| 2026-04-04 12:00 |
01:04:57.23 |
+08:40:25.6 |
HIP 5103 |
21.55 |
| 2026-04-05 00:00 |
01:05:21.30 |
+08:43:42.2 |
HIP 5216 |
21.64 |
| 2026-04-05 12:00 |
01:05:45.38 |
+08:46:58.8 |
HIP 5216 |
14.90 |
| 2026-04-06 00:00 |
01:06:09.47 |
+08:50:15.3 |
HIP 5216 |
8.25 |
| 2026-04-06 12:00 |
01:06:33.57 |
+08:53:31.8 |
HIP 5216 |
2.51 |
| 2026-04-07 00:00 |
01:06:57.67 |
+08:56:48.3 |
HIP 5216 |
6.08 |
| 2026-04-07 12:00 |
01:07:21.77 |
+09:00:04.7 |
HIP 5216 |
12.65 |
| 2026-04-08 00:00 |
01:07:45.89 |
+09:03:21.1 |
HIP 5216 |
19.37 |
| 2026-04-08 12:00 |
01:08:10.00 |
+09:06:37.5 |
HIP 5216 |
26.13 |
| 2026-04-09 00:00 |
01:08:34.12 |
+09:09:53.8 |
HIP 5216 |
32.90 |
| 2026-04-09 12:00 |
01:08:58.24 |
+09:13:10.0 |
HIP 5387 |
30.67 |
| 2026-04-10 00:00 |
01:09:22.37 |
+09:16:26.2 |
HIP 5387 |
28.17 |
| 2026-04-10 12:00 |
01:09:46.49 |
+09:19:42.4 |
HIP 5534 |
21.86 |
| 2026-04-11 00:00 |
01:10:10.62 |
+09:22:58.5 |
HIP 5534 |
15.26 |
| 2026-04-11 12:00 |
01:10:34.75 |
+09:26:14.5 |
HIP 5534 |
8.95 |
| 2026-04-12 00:00 |
01:10:58.88 |
+09:29:30.5 |
HIP 5534 |
4.44 |
| 2026-04-12 12:00 |
01:11:23.00 |
+09:32:46.4 |
HIP 5534 |
7.17 |
| 2026-04-13 00:00 |
01:11:47.13 |
+09:36:02.2 |
HIP 5534 |
13.23 |
| 2026-04-13 12:00 |
01:12:11.26 |
+09:39:17.9 |
HIP 5534 |
19.77 |
| 2026-04-14 00:00 |
01:12:35.38 |
+09:42:33.6 |
HIP 5534 |
26.43 |
| 2026-04-14 12:00 |
01:12:59.50 |
+09:45:49.2 |
HIP 5837 |
27.55 |
| 2026-04-15 00:00 |
01:13:23.62 |
+09:49:04.7 |
HIP 5837 |
22.06 |
| 2026-04-15 12:00 |
01:13:47.73 |
+09:52:20.2 |
HIP 5837 |
17.50 |
| 2026-04-16 00:00 |
01:14:11.84 |
+09:55:35.5 |
HIP 5837 |
14.75 |