메타데이터
| 항목 |
값 |
| Designation |
C/1986 V1 (Sorrells) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-03-09T15:47:46.700160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
360 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
13.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1987-02-24.0000000 |
| e |
0.99992595 |
| q (au) |
1.721158 |
| a (au) |
23244.336024 |
| i (deg) |
160.579825 |
| Ω (om, deg) |
74.802450 |
| ω (w, deg) |
70.233014 |
| M (ma, deg) |
359.999996 |
밝기
산란 + 전체 선형
$$
M_a = (3.512 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.512 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 1986-11-02 |
1986-12-29 |
+9.0293 |
-2.778 |
| 1986-12-29 |
1987-02-28 |
-7.9512 |
+1.990 |
| 1987-04-11 |
1987-09-20 |
-0.2477 |
-0.077 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:08:15.97 |
-23:19:37.8 |
HIP 64133 |
14.30 |
| 2026-09-20 12:00 |
13:08:17.63 |
-23:19:44.4 |
HIP 64133 |
14.27 |
| 2026-09-21 00:00 |
13:08:19.31 |
-23:19:51.1 |
HIP 64133 |
14.24 |
| 2026-09-21 12:00 |
13:08:20.99 |
-23:19:57.8 |
HIP 64133 |
14.23 |
| 2026-09-22 00:00 |
13:08:22.68 |
-23:20:04.7 |
HIP 64133 |
14.23 |
| 2026-09-22 12:00 |
13:08:24.37 |
-23:20:11.6 |
HIP 64133 |
14.24 |
| 2026-09-23 00:00 |
13:08:26.06 |
-23:20:18.6 |
HIP 64133 |
14.26 |
| 2026-09-23 12:00 |
13:08:27.76 |
-23:20:25.7 |
HIP 64133 |
14.30 |
| 2026-09-24 00:00 |
13:08:29.47 |
-23:20:32.9 |
HIP 64133 |
14.35 |
| 2026-09-24 12:00 |
13:08:31.18 |
-23:20:40.2 |
HIP 64133 |
14.41 |
| 2026-09-25 00:00 |
13:08:32.89 |
-23:20:47.6 |
HIP 64133 |
14.49 |
| 2026-09-25 12:00 |
13:08:34.61 |
-23:20:55.0 |
HIP 64133 |
14.58 |
| 2026-09-26 00:00 |
13:08:36.33 |
-23:21:02.6 |
HIP 64133 |
14.68 |
| 2026-09-26 12:00 |
13:08:38.06 |
-23:21:10.2 |
HIP 64133 |
14.79 |
| 2026-09-27 00:00 |
13:08:39.79 |
-23:21:17.9 |
HIP 64133 |
14.92 |
| 2026-09-27 12:00 |
13:08:41.52 |
-23:21:25.7 |
HIP 64133 |
15.05 |
| 2026-09-28 00:00 |
13:08:43.26 |
-23:21:33.5 |
HIP 64166 |
15.19 |
| 2026-09-28 12:00 |
13:08:45.00 |
-23:21:41.5 |
HIP 64166 |
15.20 |
| 2026-09-29 00:00 |
13:08:46.75 |
-23:21:49.5 |
HIP 64166 |
15.23 |
| 2026-09-29 12:00 |
13:08:48.50 |
-23:21:57.6 |
HIP 64166 |
15.26 |
| 2026-09-30 00:00 |
13:08:50.25 |
-23:22:05.8 |
HIP 64166 |
15.31 |
| 2026-09-30 12:00 |
13:08:52.01 |
-23:22:14.1 |
HIP 64166 |
15.38 |
| 2026-10-01 00:00 |
13:08:53.77 |
-23:22:22.4 |
HIP 64166 |
15.45 |
| 2026-10-01 12:00 |
13:08:55.53 |
-23:22:30.9 |
HIP 64166 |
15.54 |
| 2026-10-02 00:00 |
13:08:57.29 |
-23:22:39.4 |
HIP 64166 |
15.64 |
| 2026-10-02 12:00 |
13:08:59.06 |
-23:22:48.0 |
HIP 64166 |
15.75 |
| 2026-10-03 00:00 |
13:09:00.83 |
-23:22:56.6 |
HIP 64166 |
15.88 |
| 2026-10-03 12:00 |
13:09:02.60 |
-23:23:05.4 |
HIP 64166 |
16.01 |
| 2026-10-04 00:00 |
13:09:04.38 |
-23:23:14.2 |
HIP 64166 |
16.16 |
| 2026-10-04 12:00 |
13:09:06.16 |
-23:23:23.1 |
HIP 64166 |
16.32 |
| 2026-10-05 00:00 |
13:09:07.94 |
-23:23:32.0 |
HIP 64166 |
16.49 |
| 2026-10-05 12:00 |
13:09:09.72 |
-23:23:41.1 |
HIP 64166 |
16.67 |
| 2026-10-06 00:00 |
13:09:11.50 |
-23:23:50.2 |
HIP 64166 |
16.86 |
| 2026-10-06 12:00 |
13:09:13.29 |
-23:23:59.4 |
HIP 64166 |
17.07 |
| 2026-10-07 00:00 |
13:09:15.07 |
-23:24:08.6 |
HIP 64166 |
17.28 |
| 2026-10-07 12:00 |
13:09:16.86 |
-23:24:18.0 |
HIP 64166 |
17.50 |
| 2026-10-08 00:00 |
13:09:18.65 |
-23:24:27.4 |
HIP 64166 |
17.73 |
| 2026-10-08 12:00 |
13:09:20.44 |
-23:24:36.9 |
HIP 64166 |
17.97 |
| 2026-10-09 00:00 |
13:09:22.23 |
-23:24:46.4 |
HIP 64166 |
18.22 |
| 2026-10-09 12:00 |
13:09:24.03 |
-23:24:56.0 |
HIP 64271 |
18.15 |
| 2026-10-10 00:00 |
13:09:25.82 |
-23:25:05.7 |
HIP 64271 |
17.74 |
| 2026-10-10 12:00 |
13:09:27.61 |
-23:25:15.4 |
HIP 64271 |
17.34 |
| 2026-10-11 00:00 |
13:09:29.41 |
-23:25:25.3 |
HIP 64271 |
16.93 |