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) |
| 2026-05-12 00:00 |
00:29:48.81 |
-44:49:07.0 |
HIP 2284 |
15.93 |
| 2026-05-12 12:00 |
00:29:50.81 |
-44:49:18.3 |
HIP 2284 |
15.91 |
| 2026-05-13 00:00 |
00:29:52.80 |
-44:49:29.7 |
HIP 2284 |
15.90 |
| 2026-05-13 12:00 |
00:29:54.77 |
-44:49:41.4 |
HIP 2284 |
15.90 |
| 2026-05-14 00:00 |
00:29:56.72 |
-44:49:53.3 |
HIP 2284 |
15.90 |
| 2026-05-14 12:00 |
00:29:58.66 |
-44:50:05.3 |
HIP 2284 |
15.91 |
| 2026-05-15 00:00 |
00:30:00.59 |
-44:50:17.6 |
HIP 2284 |
15.92 |
| 2026-05-15 12:00 |
00:30:02.49 |
-44:50:30.0 |
HIP 2284 |
15.94 |
| 2026-05-16 00:00 |
00:30:04.38 |
-44:50:42.7 |
HIP 2284 |
15.96 |
| 2026-05-16 12:00 |
00:30:06.26 |
-44:50:55.5 |
HIP 2284 |
15.99 |
| 2026-05-17 00:00 |
00:30:08.11 |
-44:51:08.5 |
HIP 2284 |
16.03 |
| 2026-05-17 12:00 |
00:30:09.95 |
-44:51:21.8 |
HIP 2284 |
16.07 |
| 2026-05-18 00:00 |
00:30:11.78 |
-44:51:35.2 |
HIP 2284 |
16.11 |
| 2026-05-18 12:00 |
00:30:13.58 |
-44:51:48.8 |
HIP 2284 |
16.16 |
| 2026-05-19 00:00 |
00:30:15.37 |
-44:52:02.6 |
HIP 2284 |
16.21 |
| 2026-05-19 12:00 |
00:30:17.14 |
-44:52:16.5 |
HIP 2284 |
16.27 |
| 2026-05-20 00:00 |
00:30:18.89 |
-44:52:30.7 |
HIP 2284 |
16.34 |
| 2026-05-20 12:00 |
00:30:20.63 |
-44:52:45.1 |
HIP 2284 |
16.41 |
| 2026-05-21 00:00 |
00:30:22.34 |
-44:52:59.6 |
HIP 2284 |
16.48 |
| 2026-05-21 12:00 |
00:30:24.04 |
-44:53:14.3 |
HIP 2284 |
16.56 |
| 2026-05-22 00:00 |
00:30:25.72 |
-44:53:29.2 |
HIP 2284 |
16.64 |
| 2026-05-22 12:00 |
00:30:27.39 |
-44:53:44.3 |
HIP 2284 |
16.72 |
| 2026-05-23 00:00 |
00:30:29.03 |
-44:53:59.6 |
HIP 2284 |
16.81 |
| 2026-05-23 12:00 |
00:30:30.66 |
-44:54:15.0 |
HIP 2284 |
16.91 |
| 2026-05-24 00:00 |
00:30:32.26 |
-44:54:30.6 |
HIP 2284 |
17.00 |
| 2026-05-24 12:00 |
00:30:33.85 |
-44:54:46.4 |
HIP 2284 |
17.11 |
| 2026-05-25 00:00 |
00:30:35.42 |
-44:55:02.4 |
HIP 2284 |
17.21 |
| 2026-05-25 12:00 |
00:30:36.97 |
-44:55:18.6 |
HIP 2284 |
17.32 |
| 2026-05-26 00:00 |
00:30:38.50 |
-44:55:34.9 |
HIP 2284 |
17.43 |
| 2026-05-26 12:00 |
00:30:40.02 |
-44:55:51.4 |
HIP 2284 |
17.55 |
| 2026-05-27 00:00 |
00:30:41.51 |
-44:56:08.0 |
HIP 2284 |
17.67 |
| 2026-05-27 12:00 |
00:30:42.98 |
-44:56:24.9 |
HIP 2284 |
17.79 |
| 2026-05-28 00:00 |
00:30:44.44 |
-44:56:41.9 |
HIP 2284 |
17.91 |
| 2026-05-28 12:00 |
00:30:45.88 |
-44:56:59.1 |
HIP 2284 |
18.04 |
| 2026-05-29 00:00 |
00:30:47.29 |
-44:57:16.4 |
HIP 2284 |
18.17 |
| 2026-05-29 12:00 |
00:30:48.69 |
-44:57:33.9 |
HIP 2284 |
18.30 |
| 2026-05-30 00:00 |
00:30:50.06 |
-44:57:51.6 |
HIP 2284 |
18.44 |
| 2026-05-30 12:00 |
00:30:51.42 |
-44:58:09.5 |
HIP 2284 |
18.58 |
| 2026-05-31 00:00 |
00:30:52.76 |
-44:58:27.5 |
HIP 2284 |
18.72 |
| 2026-05-31 12:00 |
00:30:54.08 |
-44:58:45.6 |
HIP 2284 |
18.86 |
| 2026-06-01 00:00 |
00:30:55.37 |
-44:59:04.0 |
HIP 2284 |
19.01 |
| 2026-06-01 12:00 |
00:30:56.65 |
-44:59:22.4 |
HIP 2284 |
19.16 |
| 2026-06-02 00:00 |
00:30:57.90 |
-44:59:41.1 |
HIP 2284 |
19.31 |