메타데이터
| 항목 |
값 |
| Designation |
C/2014 S2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-12-09T19:08:29.909760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:00Z |
| Obs used |
2941 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-01-10.0000000 |
| e |
0.98762625 |
| q (au) |
2.100643 |
| a (au) |
169.766118 |
| i (deg) |
64.670381 |
| Ω (om, deg) |
8.122248 |
| ω (w, deg) |
87.806610 |
| M (ma, deg) |
0.013903 |
밝기
산란 + 전체 선형
$$
M_a = (5.333 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.333 |
| n |
6.000 |
| gf |
0.802 |
| gb |
-0.500 |
| k |
0.936 |
| δ90 |
1.000 |
| 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 |
| 2014-04-28 |
2015-04-25 |
-24.2188 |
+17.742 |
| 2015-04-25 |
2015-12-09 |
+33.0276 |
-11.675 |
| 2015-12-09 |
2017-04-01 |
+2.8013 |
-2.446 |
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 |
12:40:00.87 |
-56:15:29.6 |
HIP 61928 |
12.55 |
| 2026-09-20 12:00 |
12:40:08.37 |
-56:15:39.8 |
HIP 61928 |
11.50 |
| 2026-09-21 00:00 |
12:40:15.87 |
-56:15:50.4 |
HIP 61928 |
10.45 |
| 2026-09-21 12:00 |
12:40:23.38 |
-56:16:01.5 |
HIP 61928 |
9.39 |
| 2026-09-22 00:00 |
12:40:30.91 |
-56:16:13.0 |
HIP 61928 |
8.33 |
| 2026-09-22 12:00 |
12:40:38.45 |
-56:16:25.0 |
HIP 61928 |
7.27 |
| 2026-09-23 00:00 |
12:40:46.00 |
-56:16:37.4 |
HIP 61928 |
6.20 |
| 2026-09-23 12:00 |
12:40:53.56 |
-56:16:50.2 |
HIP 61928 |
5.13 |
| 2026-09-24 00:00 |
12:41:01.13 |
-56:17:03.6 |
HIP 61928 |
4.06 |
| 2026-09-24 12:00 |
12:41:08.71 |
-56:17:17.3 |
HIP 61928 |
2.99 |
| 2026-09-25 00:00 |
12:41:16.31 |
-56:17:31.5 |
HIP 61928 |
1.93 |
| 2026-09-25 12:00 |
12:41:23.90 |
-56:17:46.2 |
HIP 61928 |
0.88 |
| 2026-09-26 00:00 |
12:41:31.51 |
-56:18:01.3 |
HIP 61928 |
0.42 |
| 2026-09-26 12:00 |
12:41:39.13 |
-56:18:16.8 |
HIP 61928 |
1.39 |
| 2026-09-27 00:00 |
12:41:46.75 |
-56:18:32.8 |
HIP 61928 |
2.46 |
| 2026-09-27 12:00 |
12:41:54.39 |
-56:18:49.2 |
HIP 61928 |
3.55 |
| 2026-09-28 00:00 |
12:42:02.02 |
-56:19:06.1 |
HIP 61928 |
4.64 |
| 2026-09-28 12:00 |
12:42:09.67 |
-56:19:23.4 |
HIP 61928 |
5.74 |
| 2026-09-29 00:00 |
12:42:17.32 |
-56:19:41.1 |
HIP 61928 |
6.83 |
| 2026-09-29 12:00 |
12:42:24.98 |
-56:19:59.3 |
HIP 61983 |
7.04 |
| 2026-09-30 00:00 |
12:42:32.64 |
-56:20:17.9 |
HIP 61983 |
7.20 |
| 2026-09-30 12:00 |
12:42:40.31 |
-56:20:36.9 |
HIP 61983 |
7.50 |
| 2026-10-01 00:00 |
12:42:47.98 |
-56:20:56.4 |
HIP 61983 |
7.95 |
| 2026-10-01 12:00 |
12:42:55.66 |
-56:21:16.4 |
HIP 61983 |
8.52 |
| 2026-10-02 00:00 |
12:43:03.34 |
-56:21:36.7 |
HIP 61983 |
9.18 |
| 2026-10-02 12:00 |
12:43:11.02 |
-56:21:57.5 |
HIP 61983 |
9.92 |
| 2026-10-03 00:00 |
12:43:18.71 |
-56:22:18.7 |
HIP 61983 |
10.72 |
| 2026-10-03 12:00 |
12:43:26.40 |
-56:22:40.4 |
HIP 61983 |
11.57 |
| 2026-10-04 00:00 |
12:43:34.09 |
-56:23:02.5 |
HIP 61983 |
12.47 |
| 2026-10-04 12:00 |
12:43:41.78 |
-56:23:25.0 |
HIP 62224 |
12.79 |
| 2026-10-05 00:00 |
12:43:49.47 |
-56:23:48.0 |
HIP 62224 |
11.89 |
| 2026-10-05 12:00 |
12:43:57.17 |
-56:24:11.4 |
HIP 62224 |
11.05 |
| 2026-10-06 00:00 |
12:44:04.86 |
-56:24:35.2 |
HIP 62224 |
10.26 |
| 2026-10-06 12:00 |
12:44:12.56 |
-56:24:59.4 |
HIP 62224 |
9.55 |
| 2026-10-07 00:00 |
12:44:20.25 |
-56:25:24.1 |
HIP 62224 |
8.93 |
| 2026-10-07 12:00 |
12:44:27.94 |
-56:25:49.2 |
HIP 62224 |
8.43 |
| 2026-10-08 00:00 |
12:44:35.64 |
-56:26:14.7 |
HIP 62224 |
8.07 |
| 2026-10-08 12:00 |
12:44:43.32 |
-56:26:40.6 |
HIP 62224 |
7.87 |
| 2026-10-09 00:00 |
12:44:51.01 |
-56:27:07.0 |
HIP 62224 |
7.83 |
| 2026-10-09 12:00 |
12:44:58.69 |
-56:27:33.8 |
HIP 62224 |
7.98 |
| 2026-10-10 00:00 |
12:45:06.37 |
-56:28:01.0 |
HIP 62224 |
8.28 |
| 2026-10-10 12:00 |
12:45:14.05 |
-56:28:28.6 |
HIP 62224 |
8.74 |
| 2026-10-11 00:00 |
12:45:21.72 |
-56:28:56.6 |
HIP 62327 |
8.43 |