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 |
-0.998 |
| 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) |
| 2026-05-12 00:00 |
13:07:53.39 |
-23:44:05.9 |
HIP 64095 |
9.34 |
| 2026-05-12 12:00 |
13:07:51.72 |
-23:43:52.7 |
HIP 64095 |
9.28 |
| 2026-05-13 00:00 |
13:07:50.06 |
-23:43:39.6 |
HIP 64095 |
9.23 |
| 2026-05-13 12:00 |
13:07:48.41 |
-23:43:26.4 |
HIP 64095 |
9.20 |
| 2026-05-14 00:00 |
13:07:46.77 |
-23:43:13.2 |
HIP 64095 |
9.20 |
| 2026-05-14 12:00 |
13:07:45.14 |
-23:43:00.1 |
HIP 64095 |
9.21 |
| 2026-05-15 00:00 |
13:07:43.52 |
-23:42:46.9 |
HIP 64095 |
9.24 |
| 2026-05-15 12:00 |
13:07:41.90 |
-23:42:33.7 |
HIP 64095 |
9.29 |
| 2026-05-16 00:00 |
13:07:40.30 |
-23:42:20.5 |
HIP 64095 |
9.36 |
| 2026-05-16 12:00 |
13:07:38.71 |
-23:42:07.3 |
HIP 64095 |
9.44 |
| 2026-05-17 00:00 |
13:07:37.13 |
-23:41:54.1 |
HIP 64095 |
9.54 |
| 2026-05-17 12:00 |
13:07:35.55 |
-23:41:40.9 |
HIP 64095 |
9.66 |
| 2026-05-18 00:00 |
13:07:33.99 |
-23:41:27.7 |
HIP 64095 |
9.79 |
| 2026-05-18 12:00 |
13:07:32.44 |
-23:41:14.5 |
HIP 64095 |
9.94 |
| 2026-05-19 00:00 |
13:07:30.90 |
-23:41:01.3 |
HIP 64095 |
10.10 |
| 2026-05-19 12:00 |
13:07:29.37 |
-23:40:48.2 |
HIP 64095 |
10.27 |
| 2026-05-20 00:00 |
13:07:27.85 |
-23:40:35.0 |
HIP 64095 |
10.46 |
| 2026-05-20 12:00 |
13:07:26.34 |
-23:40:21.8 |
HIP 64095 |
10.65 |
| 2026-05-21 00:00 |
13:07:24.84 |
-23:40:08.7 |
HIP 64095 |
10.85 |
| 2026-05-21 12:00 |
13:07:23.36 |
-23:39:55.5 |
HIP 64095 |
11.07 |
| 2026-05-22 00:00 |
13:07:21.88 |
-23:39:42.4 |
HIP 64095 |
11.29 |
| 2026-05-22 12:00 |
13:07:20.42 |
-23:39:29.2 |
HIP 64095 |
11.52 |
| 2026-05-23 00:00 |
13:07:18.97 |
-23:39:16.1 |
HIP 64095 |
11.75 |
| 2026-05-23 12:00 |
13:07:17.52 |
-23:39:03.0 |
HIP 64095 |
11.99 |
| 2026-05-24 00:00 |
13:07:16.10 |
-23:38:49.9 |
HIP 64095 |
12.24 |
| 2026-05-24 12:00 |
13:07:14.68 |
-23:38:36.9 |
HIP 64095 |
12.49 |
| 2026-05-25 00:00 |
13:07:13.27 |
-23:38:23.8 |
HIP 64095 |
12.75 |
| 2026-05-25 12:00 |
13:07:11.88 |
-23:38:10.8 |
HIP 64095 |
13.01 |
| 2026-05-26 00:00 |
13:07:10.49 |
-23:37:57.7 |
HIP 64095 |
13.28 |
| 2026-05-26 12:00 |
13:07:09.12 |
-23:37:44.7 |
HIP 64095 |
13.54 |
| 2026-05-27 00:00 |
13:07:07.77 |
-23:37:31.7 |
HIP 64095 |
13.81 |
| 2026-05-27 12:00 |
13:07:06.42 |
-23:37:18.8 |
HIP 64095 |
14.08 |
| 2026-05-28 00:00 |
13:07:05.09 |
-23:37:05.8 |
HIP 64095 |
14.36 |
| 2026-05-28 12:00 |
13:07:03.76 |
-23:36:52.9 |
HIP 64095 |
14.64 |
| 2026-05-29 00:00 |
13:07:02.45 |
-23:36:40.0 |
HIP 64095 |
14.91 |
| 2026-05-29 12:00 |
13:07:01.16 |
-23:36:27.1 |
HIP 64095 |
15.19 |
| 2026-05-30 00:00 |
13:06:59.87 |
-23:36:14.3 |
HIP 64095 |
15.47 |
| 2026-05-30 12:00 |
13:06:58.60 |
-23:36:01.4 |
HIP 64095 |
15.75 |
| 2026-05-31 00:00 |
13:06:57.34 |
-23:35:48.6 |
HIP 64095 |
16.03 |
| 2026-05-31 12:00 |
13:06:56.10 |
-23:35:35.9 |
HIP 64095 |
16.31 |
| 2026-06-01 00:00 |
13:06:54.86 |
-23:35:23.1 |
HIP 64095 |
16.59 |
| 2026-06-01 12:00 |
13:06:53.64 |
-23:35:10.4 |
HIP 64095 |
16.87 |
| 2026-06-02 00:00 |
13:06:52.43 |
-23:34:57.7 |
HIP 64095 |
17.15 |