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) |
| 2026-09-20 00:00 |
00:26:50.81 |
-46:25:06.3 |
HIP 2005 |
33.79 |
| 2026-09-20 12:00 |
00:26:47.90 |
-46:25:20.0 |
HIP 2005 |
33.37 |
| 2026-09-21 00:00 |
00:26:45.00 |
-46:25:33.4 |
HIP 2005 |
32.96 |
| 2026-09-21 12:00 |
00:26:42.09 |
-46:25:46.7 |
HIP 2005 |
32.55 |
| 2026-09-22 00:00 |
00:26:39.17 |
-46:25:59.7 |
HIP 2005 |
32.15 |
| 2026-09-22 12:00 |
00:26:36.25 |
-46:26:12.6 |
HIP 2005 |
31.75 |
| 2026-09-23 00:00 |
00:26:33.33 |
-46:26:25.2 |
HIP 2005 |
31.37 |
| 2026-09-23 12:00 |
00:26:30.40 |
-46:26:37.6 |
HIP 2005 |
30.99 |
| 2026-09-24 00:00 |
00:26:27.48 |
-46:26:49.8 |
HIP 2005 |
30.61 |
| 2026-09-24 12:00 |
00:26:24.54 |
-46:27:01.9 |
HIP 2005 |
30.25 |
| 2026-09-25 00:00 |
00:26:21.61 |
-46:27:13.7 |
HIP 2005 |
29.90 |
| 2026-09-25 12:00 |
00:26:18.67 |
-46:27:25.3 |
HIP 2005 |
29.55 |
| 2026-09-26 00:00 |
00:26:15.74 |
-46:27:36.6 |
HIP 2005 |
29.22 |
| 2026-09-26 12:00 |
00:26:12.80 |
-46:27:47.8 |
HIP 2005 |
28.89 |
| 2026-09-27 00:00 |
00:26:09.85 |
-46:27:58.8 |
HIP 2005 |
28.57 |
| 2026-09-27 12:00 |
00:26:06.91 |
-46:28:09.5 |
HIP 2005 |
28.26 |
| 2026-09-28 00:00 |
00:26:03.97 |
-46:28:20.0 |
HIP 2005 |
27.97 |
| 2026-09-28 12:00 |
00:26:01.02 |
-46:28:30.4 |
HIP 2005 |
27.68 |
| 2026-09-29 00:00 |
00:25:58.08 |
-46:28:40.5 |
HIP 2005 |
27.40 |
| 2026-09-29 12:00 |
00:25:55.13 |
-46:28:50.4 |
HIP 2005 |
27.14 |
| 2026-09-30 00:00 |
00:25:52.18 |
-46:29:00.0 |
HIP 2005 |
26.89 |
| 2026-09-30 12:00 |
00:25:49.23 |
-46:29:09.5 |
HIP 2005 |
26.64 |
| 2026-10-01 00:00 |
00:25:46.29 |
-46:29:18.7 |
HIP 2005 |
26.42 |
| 2026-10-01 12:00 |
00:25:43.34 |
-46:29:27.8 |
HIP 2005 |
26.20 |
| 2026-10-02 00:00 |
00:25:40.39 |
-46:29:36.6 |
HIP 2005 |
25.99 |
| 2026-10-02 12:00 |
00:25:37.45 |
-46:29:45.2 |
HIP 2005 |
25.80 |
| 2026-10-03 00:00 |
00:25:34.50 |
-46:29:53.5 |
HIP 2005 |
25.62 |
| 2026-10-03 12:00 |
00:25:31.56 |
-46:30:01.7 |
HIP 2005 |
25.46 |
| 2026-10-04 00:00 |
00:25:28.62 |
-46:30:09.6 |
HIP 2005 |
25.31 |
| 2026-10-04 12:00 |
00:25:25.68 |
-46:30:17.3 |
HIP 2005 |
25.17 |
| 2026-10-05 00:00 |
00:25:22.74 |
-46:30:24.8 |
HIP 2005 |
25.04 |
| 2026-10-05 12:00 |
00:25:19.80 |
-46:30:32.0 |
HIP 2005 |
24.93 |
| 2026-10-06 00:00 |
00:25:16.87 |
-46:30:39.0 |
HIP 2005 |
24.83 |
| 2026-10-06 12:00 |
00:25:13.94 |
-46:30:45.8 |
HIP 2005 |
24.75 |
| 2026-10-07 00:00 |
00:25:11.01 |
-46:30:52.4 |
HIP 2005 |
24.68 |
| 2026-10-07 12:00 |
00:25:08.08 |
-46:30:58.8 |
HIP 2005 |
24.63 |
| 2026-10-08 00:00 |
00:25:05.16 |
-46:31:04.9 |
HIP 2005 |
24.59 |
| 2026-10-08 12:00 |
00:25:02.24 |
-46:31:10.8 |
HIP 2005 |
24.56 |
| 2026-10-09 00:00 |
00:24:59.32 |
-46:31:16.4 |
HIP 2005 |
24.55 |
| 2026-10-09 12:00 |
00:24:56.41 |
-46:31:21.9 |
HIP 2005 |
24.55 |
| 2026-10-10 00:00 |
00:24:53.51 |
-46:31:27.1 |
HIP 2005 |
24.57 |
| 2026-10-10 12:00 |
00:24:50.60 |
-46:31:32.1 |
HIP 2005 |
24.60 |
| 2026-10-11 00:00 |
00:24:47.71 |
-46:31:36.8 |
HIP 2005 |
24.64 |