메타데이터
| 항목 |
값 |
| Designation |
P/2021 R3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-05-27T03:58:54.658560Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:08Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
18.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-09-05T07:39:54.432000Z |
| Discovery magnitude (MPC) |
21.40 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-08-28.0000000 |
| e |
0.33193059 |
| q (au) |
2.525552 |
| a (au) |
3.780374 |
| i (deg) |
19.933099 |
| Ω (om, deg) |
304.252763 |
| ω (w, deg) |
3.018607 |
| M (ma, deg) |
12.448284 |
밝기
산란 + 전체 선형
$$
M_a = (17.612 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.612 |
| n |
2.000 |
| gf |
0.906 |
| gb |
-0.732 |
| k |
0.996 |
| δ90 |
5.561 |
| 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) |
| 2026-05-12 00:00 |
09:44:28.72 |
-00:16:45.6 |
HIP 47849 |
15.42 |
| 2026-05-12 12:00 |
09:44:34.89 |
-00:16:38.6 |
HIP 47849 |
14.49 |
| 2026-05-13 00:00 |
09:44:41.26 |
-00:16:32.7 |
HIP 47849 |
13.62 |
| 2026-05-13 12:00 |
09:44:47.82 |
-00:16:27.8 |
HIP 47849 |
12.86 |
| 2026-05-14 00:00 |
09:44:54.58 |
-00:16:24.0 |
HIP 47849 |
12.24 |
| 2026-05-14 12:00 |
09:45:01.53 |
-00:16:21.3 |
HIP 47849 |
11.80 |
| 2026-05-15 00:00 |
09:45:08.67 |
-00:16:19.7 |
HIP 47849 |
11.58 |
| 2026-05-15 12:00 |
09:45:16.01 |
-00:16:19.1 |
HIP 47849 |
11.63 |
| 2026-05-16 00:00 |
09:45:23.53 |
-00:16:19.7 |
HIP 47849 |
11.95 |
| 2026-05-16 12:00 |
09:45:31.25 |
-00:16:21.4 |
HIP 47849 |
12.56 |
| 2026-05-17 00:00 |
09:45:39.16 |
-00:16:24.1 |
HIP 47849 |
13.42 |
| 2026-05-17 12:00 |
09:45:47.25 |
-00:16:28.0 |
HIP 47849 |
14.52 |
| 2026-05-18 00:00 |
09:45:55.53 |
-00:16:33.0 |
HIP 47849 |
15.82 |
| 2026-05-18 12:00 |
09:46:03.99 |
-00:16:39.0 |
HIP 47948 |
16.77 |
| 2026-05-19 00:00 |
09:46:12.64 |
-00:16:46.2 |
HIP 47948 |
16.72 |
| 2026-05-19 12:00 |
09:46:21.48 |
-00:16:54.5 |
HIP 47948 |
16.97 |
| 2026-05-20 00:00 |
09:46:30.50 |
-00:17:03.9 |
HIP 47948 |
17.53 |
| 2026-05-20 12:00 |
09:46:39.70 |
-00:17:14.3 |
HIP 47948 |
18.39 |
| 2026-05-21 00:00 |
09:46:49.07 |
-00:17:25.9 |
HIP 47948 |
19.52 |
| 2026-05-21 12:00 |
09:46:58.63 |
-00:17:38.6 |
HIP 48000 |
19.53 |
| 2026-05-22 00:00 |
09:47:08.37 |
-00:17:52.5 |
HIP 48000 |
19.26 |
| 2026-05-22 12:00 |
09:47:18.29 |
-00:18:07.4 |
HIP 48000 |
19.29 |
| 2026-05-23 00:00 |
09:47:28.38 |
-00:18:23.4 |
HIP 48000 |
19.63 |
| 2026-05-23 12:00 |
09:47:38.64 |
-00:18:40.5 |
HIP 48000 |
20.28 |
| 2026-05-24 00:00 |
09:47:49.08 |
-00:18:58.7 |
HIP 48000 |
21.24 |
| 2026-05-24 12:00 |
09:47:59.69 |
-00:19:18.1 |
HIP 48000 |
22.48 |
| 2026-05-25 00:00 |
09:48:10.48 |
-00:19:38.5 |
HIP 48000 |
23.96 |
| 2026-05-25 12:00 |
09:48:21.43 |
-00:20:00.0 |
HIP 48000 |
25.67 |
| 2026-05-26 00:00 |
09:48:32.55 |
-00:20:22.7 |
HIP 48252 |
25.80 |
| 2026-05-26 12:00 |
09:48:43.84 |
-00:20:46.4 |
HIP 48252 |
23.20 |
| 2026-05-27 00:00 |
09:48:55.30 |
-00:21:11.2 |
HIP 48252 |
20.64 |
| 2026-05-27 12:00 |
09:49:06.92 |
-00:21:37.2 |
HIP 48252 |
18.14 |
| 2026-05-28 00:00 |
09:49:18.71 |
-00:22:04.2 |
HIP 48252 |
15.78 |
| 2026-05-28 12:00 |
09:49:30.67 |
-00:22:32.3 |
HIP 48252 |
13.64 |
| 2026-05-29 00:00 |
09:49:42.78 |
-00:23:01.5 |
HIP 48252 |
11.88 |
| 2026-05-29 12:00 |
09:49:55.06 |
-00:23:31.8 |
HIP 48252 |
10.72 |
| 2026-05-30 00:00 |
09:50:07.50 |
-00:24:03.2 |
HIP 48252 |
10.41 |
| 2026-05-30 12:00 |
09:50:20.10 |
-00:24:35.7 |
HIP 48252 |
11.06 |
| 2026-05-31 00:00 |
09:50:32.85 |
-00:25:09.3 |
HIP 48252 |
12.55 |
| 2026-05-31 12:00 |
09:50:45.77 |
-00:25:43.9 |
HIP 48252 |
14.66 |
| 2026-06-01 00:00 |
09:50:58.84 |
-00:26:19.7 |
HIP 48252 |
17.18 |
| 2026-06-01 12:00 |
09:51:12.07 |
-00:26:56.5 |
HIP 48252 |
19.97 |
| 2026-06-02 00:00 |
09:51:25.45 |
-00:27:34.4 |
HIP 48252 |
22.96 |