메타데이터
| 항목 |
값 |
| Designation |
C/1992 J1 (Spacewatch) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1993-09-05T13:00:26.484480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
240 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
9.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1993-08-03.0000000 |
| e |
0.99997349 |
| q (au) |
3.007011 |
| a (au) |
113435.213728 |
| i (deg) |
124.318754 |
| Ω (om, deg) |
203.324133 |
| ω (w, deg) |
83.399442 |
| M (ma, deg) |
359.999999 |
밝기
산란 + 전체 선형
$$
M_a = (6.325 + 4.889\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.325 |
| n |
4.889 |
| gf |
0.999 |
| gb |
-0.767 |
| k |
0.993 |
| δ90 |
9.998 |
| 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 |
00:30:52.97 |
-45:46:29.2 |
HIP 2470 |
9.25 |
| 2026-07-29 12:00 |
00:30:51.60 |
-45:46:56.1 |
HIP 2470 |
9.03 |
| 2026-07-30 00:00 |
00:30:50.21 |
-45:47:22.9 |
HIP 2470 |
8.83 |
| 2026-07-30 12:00 |
00:30:48.79 |
-45:47:49.7 |
HIP 2470 |
8.67 |
| 2026-07-31 00:00 |
00:30:47.36 |
-45:48:16.4 |
HIP 2470 |
8.53 |
| 2026-07-31 12:00 |
00:30:45.90 |
-45:48:43.2 |
HIP 2470 |
8.43 |
| 2026-08-01 00:00 |
00:30:44.42 |
-45:49:09.8 |
HIP 2470 |
8.36 |
| 2026-08-01 12:00 |
00:30:42.92 |
-45:49:36.5 |
HIP 2470 |
8.32 |
| 2026-08-02 00:00 |
00:30:41.40 |
-45:50:03.1 |
HIP 2470 |
8.32 |
| 2026-08-02 12:00 |
00:30:39.86 |
-45:50:29.6 |
HIP 2470 |
8.36 |
| 2026-08-03 00:00 |
00:30:38.30 |
-45:50:56.1 |
HIP 2470 |
8.43 |
| 2026-08-03 12:00 |
00:30:36.71 |
-45:51:22.6 |
HIP 2470 |
8.53 |
| 2026-08-04 00:00 |
00:30:35.11 |
-45:51:49.0 |
HIP 2470 |
8.67 |
| 2026-08-04 12:00 |
00:30:33.48 |
-45:52:15.3 |
HIP 2470 |
8.84 |
| 2026-08-05 00:00 |
00:30:31.84 |
-45:52:41.6 |
HIP 2470 |
9.04 |
| 2026-08-05 12:00 |
00:30:30.17 |
-45:53:07.9 |
HIP 2470 |
9.27 |
| 2026-08-06 00:00 |
00:30:28.48 |
-45:53:34.1 |
HIP 2470 |
9.53 |
| 2026-08-06 12:00 |
00:30:26.77 |
-45:54:00.2 |
HIP 2470 |
9.81 |
| 2026-08-07 00:00 |
00:30:25.05 |
-45:54:26.3 |
HIP 2470 |
10.12 |
| 2026-08-07 12:00 |
00:30:23.30 |
-45:54:52.3 |
HIP 2470 |
10.45 |
| 2026-08-08 00:00 |
00:30:21.53 |
-45:55:18.2 |
HIP 2470 |
10.79 |
| 2026-08-08 12:00 |
00:30:19.74 |
-45:55:44.1 |
HIP 2470 |
11.16 |
| 2026-08-09 00:00 |
00:30:17.93 |
-45:56:09.9 |
HIP 2470 |
11.54 |
| 2026-08-09 12:00 |
00:30:16.11 |
-45:56:35.6 |
HIP 2470 |
11.93 |
| 2026-08-10 00:00 |
00:30:14.26 |
-45:57:01.3 |
HIP 2470 |
12.34 |
| 2026-08-10 12:00 |
00:30:12.39 |
-45:57:26.8 |
HIP 2470 |
12.76 |
| 2026-08-11 00:00 |
00:30:10.50 |
-45:57:52.3 |
HIP 2470 |
13.19 |
| 2026-08-11 12:00 |
00:30:08.60 |
-45:58:17.8 |
HIP 2470 |
13.63 |
| 2026-08-12 00:00 |
00:30:06.67 |
-45:58:43.1 |
HIP 2470 |
14.08 |
| 2026-08-12 12:00 |
00:30:04.73 |
-45:59:08.4 |
HIP 2470 |
14.54 |
| 2026-08-13 00:00 |
00:30:02.77 |
-45:59:33.5 |
HIP 2470 |
15.01 |
| 2026-08-13 12:00 |
00:30:00.78 |
-45:59:58.6 |
HIP 2470 |
15.49 |
| 2026-08-14 00:00 |
00:29:58.78 |
-46:00:23.6 |
HIP 2470 |
15.97 |
| 2026-08-14 12:00 |
00:29:56.76 |
-46:00:48.5 |
HIP 2470 |
16.45 |
| 2026-08-15 00:00 |
00:29:54.73 |
-46:01:13.3 |
HIP 2470 |
16.95 |
| 2026-08-15 12:00 |
00:29:52.67 |
-46:01:38.0 |
HIP 2470 |
17.44 |
| 2026-08-16 00:00 |
00:29:50.60 |
-46:02:02.6 |
HIP 2470 |
17.95 |
| 2026-08-16 12:00 |
00:29:48.51 |
-46:02:27.2 |
HIP 2236 |
18.36 |
| 2026-08-17 00:00 |
00:29:46.40 |
-46:02:51.6 |
HIP 2236 |
18.29 |
| 2026-08-17 12:00 |
00:29:44.27 |
-46:03:15.9 |
HIP 2236 |
18.23 |
| 2026-08-18 00:00 |
00:29:42.13 |
-46:03:40.1 |
HIP 2236 |
18.19 |
| 2026-08-18 12:00 |
00:29:39.97 |
-46:04:04.2 |
HIP 2236 |
18.16 |
| 2026-08-19 00:00 |
00:29:37.79 |
-46:04:28.2 |
HIP 2236 |
18.15 |