메타데이터
| 항목 |
값 |
| Designation |
258P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-06-18T01:33:18.210240Z |
| Orbit solution date (soln_date, UTC) |
2021-10-18T22:42:54Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
16.300 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-06-01.0000000 |
| e |
0.21036720 |
| q (au) |
3.478121 |
| a (au) |
4.404733 |
| i (deg) |
6.745233 |
| Ω (om, deg) |
126.294862 |
| ω (w, deg) |
26.014329 |
| M (ma, deg) |
202.413786 |
밝기
산란 + 전체 선형
$$
M_a = (15.051 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.051 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.606 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
00:19:56.27 |
-03:00:07.9 |
HIP 1539 |
11.37 |
| 2026-03-26 12:00 |
00:20:21.45 |
-02:57:32.7 |
HIP 1684 |
11.08 |
| 2026-03-27 00:00 |
00:20:46.63 |
-02:54:57.7 |
HIP 1684 |
4.41 |
| 2026-03-27 12:00 |
00:21:11.81 |
-02:52:22.9 |
HIP 1684 |
2.90 |
| 2026-03-28 00:00 |
00:21:37.00 |
-02:49:48.2 |
HIP 1684 |
9.47 |
| 2026-03-28 12:00 |
00:22:02.18 |
-02:47:13.7 |
HIP 1684 |
16.23 |
| 2026-03-29 00:00 |
00:22:27.36 |
-02:44:39.4 |
HIP 1684 |
23.01 |
| 2026-03-29 12:00 |
00:22:52.55 |
-02:42:05.2 |
HIP 1873 |
24.42 |
| 2026-03-30 00:00 |
00:23:17.73 |
-02:39:31.3 |
HIP 1873 |
24.57 |
| 2026-03-30 12:00 |
00:23:42.91 |
-02:36:57.5 |
HIP 1873 |
26.52 |
| 2026-03-31 00:00 |
00:24:08.09 |
-02:34:23.9 |
HIP 1939 |
21.93 |
| 2026-03-31 12:00 |
00:24:33.27 |
-02:31:50.6 |
HIP 1939 |
18.73 |
| 2026-04-01 00:00 |
00:24:58.44 |
-02:29:17.4 |
HIP 1939 |
17.68 |
| 2026-04-01 12:00 |
00:25:23.62 |
-02:26:44.4 |
HIP 1939 |
19.15 |
| 2026-04-02 00:00 |
00:25:48.79 |
-02:24:11.7 |
HIP 1939 |
22.65 |
| 2026-04-02 12:00 |
00:26:13.95 |
-02:21:39.1 |
HIP 1939 |
27.41 |
| 2026-04-03 00:00 |
00:26:39.11 |
-02:19:06.8 |
HIP 2242 |
29.69 |
| 2026-04-03 12:00 |
00:27:04.27 |
-02:16:34.7 |
HIP 2242 |
25.37 |
| 2026-04-04 00:00 |
00:27:29.42 |
-02:14:02.8 |
HIP 2242 |
22.30 |
| 2026-04-04 12:00 |
00:27:54.56 |
-02:11:31.2 |
HIP 2242 |
21.05 |
| 2026-04-05 00:00 |
00:28:19.70 |
-02:08:59.7 |
HIP 2242 |
21.91 |
| 2026-04-05 12:00 |
00:28:44.83 |
-02:06:28.6 |
HIP 2242 |
24.67 |
| 2026-04-06 00:00 |
00:29:09.96 |
-02:03:57.6 |
HIP 2242 |
28.78 |
| 2026-04-06 12:00 |
00:29:35.08 |
-02:01:26.9 |
HIP 2471 |
27.21 |
| 2026-04-07 00:00 |
00:30:00.18 |
-01:58:56.4 |
HIP 2471 |
21.04 |
| 2026-04-07 12:00 |
00:30:25.28 |
-01:56:26.2 |
HIP 2471 |
15.37 |
| 2026-04-08 00:00 |
00:30:50.37 |
-01:53:56.3 |
HIP 2471 |
10.99 |
| 2026-04-08 12:00 |
00:31:15.46 |
-01:51:26.6 |
HIP 2496 |
7.39 |
| 2026-04-09 00:00 |
00:31:40.53 |
-01:48:57.2 |
HIP 2496 |
1.34 |
| 2026-04-09 12:00 |
00:32:05.59 |
-01:46:28.0 |
HIP 2496 |
6.31 |
| 2026-04-10 00:00 |
00:32:30.64 |
-01:43:59.2 |
HIP 2496 |
12.99 |
| 2026-04-10 12:00 |
00:32:55.67 |
-01:41:30.6 |
HIP 2496 |
19.70 |
| 2026-04-11 00:00 |
00:33:20.70 |
-01:39:02.3 |
HIP 2496 |
26.41 |
| 2026-04-11 12:00 |
00:33:45.71 |
-01:36:34.2 |
HIP 2735 |
25.12 |
| 2026-04-12 00:00 |
00:34:10.71 |
-01:34:06.5 |
HIP 2735 |
19.19 |
| 2026-04-12 12:00 |
00:34:35.69 |
-01:31:39.1 |
HIP 2735 |
13.99 |
| 2026-04-13 00:00 |
00:35:00.66 |
-01:29:11.9 |
HIP 2735 |
10.65 |
| 2026-04-13 12:00 |
00:35:25.61 |
-01:26:45.1 |
HIP 2735 |
11.00 |
| 2026-04-14 00:00 |
00:35:50.55 |
-01:24:18.6 |
HIP 2735 |
14.78 |
| 2026-04-14 12:00 |
00:36:15.47 |
-01:21:52.4 |
HIP 2735 |
20.13 |
| 2026-04-15 00:00 |
00:36:40.38 |
-01:19:26.5 |
HIP 2735 |
26.10 |
| 2026-04-15 12:00 |
00:37:05.26 |
-01:17:00.9 |
HIP 3072 |
29.33 |
| 2026-04-16 00:00 |
00:37:30.13 |
-01:14:35.7 |
HIP 3072 |
22.72 |