메타데이터
| 항목 |
값 |
| Designation |
P/2015 A3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-02-22T20:59:44.802240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
57 |
| NEO |
Yes |
| M1 |
20.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-02-14.0000000 |
| e |
0.84590960 |
| q (au) |
1.152929 |
| a (au) |
7.482163 |
| i (deg) |
172.510659 |
| Ω (om, deg) |
277.075159 |
| ω (w, deg) |
249.619923 |
| M (ma, deg) |
359.572611 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.323\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.323 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.939 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
13:49:39.52 |
-03:07:34.2 |
HIP 67385 |
22.87 |
| 2026-03-26 12:00 |
13:49:30.72 |
-03:06:35.7 |
HIP 67385 |
20.71 |
| 2026-03-27 00:00 |
13:49:21.88 |
-03:05:37.1 |
HIP 67385 |
18.60 |
| 2026-03-27 12:00 |
13:49:13.00 |
-03:04:38.5 |
HIP 67385 |
16.57 |
| 2026-03-28 00:00 |
13:49:04.10 |
-03:03:39.9 |
HIP 67385 |
14.66 |
| 2026-03-28 12:00 |
13:48:55.16 |
-03:02:41.2 |
HIP 67385 |
12.92 |
| 2026-03-29 00:00 |
13:48:46.19 |
-03:01:42.5 |
HIP 67385 |
11.43 |
| 2026-03-29 12:00 |
13:48:37.19 |
-03:00:43.8 |
HIP 67385 |
10.31 |
| 2026-03-30 00:00 |
13:48:28.16 |
-02:59:45.0 |
HIP 67385 |
9.70 |
| 2026-03-30 12:00 |
13:48:19.10 |
-02:58:46.3 |
HIP 67385 |
9.69 |
| 2026-03-31 00:00 |
13:48:10.01 |
-02:57:47.5 |
HIP 67385 |
10.30 |
| 2026-03-31 12:00 |
13:48:00.89 |
-02:56:48.7 |
HIP 67385 |
11.43 |
| 2026-04-01 00:00 |
13:47:51.74 |
-02:55:49.9 |
HIP 67385 |
12.95 |
| 2026-04-01 12:00 |
13:47:42.57 |
-02:54:51.1 |
HIP 67385 |
14.73 |
| 2026-04-02 00:00 |
13:47:33.38 |
-02:53:52.4 |
HIP 67385 |
16.71 |
| 2026-04-02 12:00 |
13:47:24.15 |
-02:52:53.6 |
HIP 67385 |
18.82 |
| 2026-04-03 00:00 |
13:47:14.91 |
-02:51:54.9 |
HIP 67385 |
21.02 |
| 2026-04-03 12:00 |
13:47:05.64 |
-02:50:56.1 |
HIP 67385 |
23.28 |
| 2026-04-04 00:00 |
13:46:56.34 |
-02:49:57.4 |
HIP 67279 |
24.03 |
| 2026-04-04 12:00 |
13:46:47.03 |
-02:48:58.8 |
HIP 67279 |
23.77 |
| 2026-04-05 00:00 |
13:46:37.69 |
-02:48:00.1 |
HIP 67279 |
23.77 |
| 2026-04-05 12:00 |
13:46:28.33 |
-02:47:01.6 |
HIP 67279 |
24.05 |
| 2026-04-06 00:00 |
13:46:18.95 |
-02:46:03.0 |
HIP 67279 |
24.58 |
| 2026-04-06 12:00 |
13:46:09.56 |
-02:45:04.5 |
HIP 67279 |
25.37 |
| 2026-04-07 00:00 |
13:46:00.14 |
-02:44:06.1 |
HIP 67279 |
26.38 |
| 2026-04-07 12:00 |
13:45:50.71 |
-02:43:07.7 |
HIP 67279 |
27.59 |
| 2026-04-08 00:00 |
13:45:41.26 |
-02:42:09.4 |
HIP 67279 |
28.98 |
| 2026-04-08 12:00 |
13:45:31.79 |
-02:41:11.1 |
HIP 67279 |
30.53 |
| 2026-04-09 00:00 |
13:45:22.31 |
-02:40:13.0 |
HIP 67279 |
32.21 |
| 2026-04-09 12:00 |
13:45:12.81 |
-02:39:14.9 |
HIP 67279 |
34.00 |
| 2026-04-10 00:00 |
13:45:03.30 |
-02:38:16.9 |
HIP 66922 |
33.78 |
| 2026-04-10 12:00 |
13:44:53.78 |
-02:37:19.0 |
HIP 66922 |
31.22 |
| 2026-04-11 00:00 |
13:44:44.24 |
-02:36:21.1 |
HIP 66922 |
28.66 |
| 2026-04-11 12:00 |
13:44:34.70 |
-02:35:23.4 |
HIP 66922 |
26.10 |
| 2026-04-12 00:00 |
13:44:25.14 |
-02:34:25.8 |
HIP 66922 |
23.55 |
| 2026-04-12 12:00 |
13:44:15.57 |
-02:33:28.3 |
HIP 66922 |
20.99 |
| 2026-04-13 00:00 |
13:44:06.00 |
-02:32:30.9 |
HIP 66922 |
18.44 |
| 2026-04-13 12:00 |
13:43:56.41 |
-02:31:33.6 |
HIP 66922 |
15.89 |
| 2026-04-14 00:00 |
13:43:46.82 |
-02:30:36.4 |
HIP 66922 |
13.35 |
| 2026-04-14 12:00 |
13:43:37.22 |
-02:29:39.4 |
HIP 66922 |
10.83 |
| 2026-04-15 00:00 |
13:43:27.62 |
-02:28:42.5 |
HIP 66922 |
8.34 |
| 2026-04-15 12:00 |
13:43:18.01 |
-02:27:45.8 |
HIP 66922 |
5.93 |
| 2026-04-16 00:00 |
13:43:08.40 |
-02:26:49.1 |
HIP 66922 |
3.74 |