메타데이터
| 항목 |
값 |
| Designation |
P/2012 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-23T03:26:57.641280Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:35Z |
| Obs used |
1189 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
12.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-02-05.0000000 |
| e |
0.41050358 |
| q (au) |
3.825153 |
| a (au) |
6.488848 |
| i (deg) |
7.627784 |
| Ω (om, deg) |
36.194183 |
| ω (w, deg) |
162.183007 |
| M (ma, deg) |
349.973869 |
밝기
산란 + 전체 선형
$$
M_a = (3.981 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.981 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2011-12-31 |
2013-07-20 |
+5.5281 |
-3.279 |
| 2013-08-25 |
2015-06-10 |
+9.6303 |
-6.962 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:37:08.16 |
+25:59:12.9 |
HIP 21532 |
16.00 |
| 2026-06-01 12:00 |
04:37:28.87 |
+25:59:59.6 |
HIP 21532 |
16.37 |
| 2026-06-02 00:00 |
04:37:49.60 |
+26:00:46.2 |
HIP 21532 |
18.02 |
| 2026-06-02 12:00 |
04:38:10.34 |
+26:01:32.8 |
HIP 21532 |
20.65 |
| 2026-06-03 00:00 |
04:38:31.08 |
+26:02:19.3 |
HIP 21532 |
23.93 |
| 2026-06-03 12:00 |
04:38:51.84 |
+26:03:05.8 |
HIP 21532 |
27.63 |
| 2026-06-04 00:00 |
04:39:12.60 |
+26:03:52.2 |
HIP 21813 |
26.29 |
| 2026-06-04 12:00 |
04:39:33.37 |
+26:04:38.6 |
HIP 21813 |
21.86 |
| 2026-06-05 00:00 |
04:39:54.15 |
+26:05:24.9 |
HIP 21813 |
17.60 |
| 2026-06-05 12:00 |
04:40:14.93 |
+26:06:11.2 |
HIP 21813 |
13.64 |
| 2026-06-06 00:00 |
04:40:35.72 |
+26:06:57.4 |
HIP 21813 |
10.36 |
| 2026-06-06 12:00 |
04:40:56.52 |
+26:07:43.6 |
HIP 21813 |
8.56 |
| 2026-06-07 00:00 |
04:41:17.32 |
+26:08:29.6 |
HIP 21813 |
9.17 |
| 2026-06-07 12:00 |
04:41:38.12 |
+26:09:15.7 |
HIP 21813 |
11.82 |
| 2026-06-08 00:00 |
04:41:58.93 |
+26:10:01.6 |
HIP 21813 |
15.49 |
| 2026-06-08 12:00 |
04:42:19.74 |
+26:10:47.6 |
HIP 21951 |
10.85 |
| 2026-06-09 00:00 |
04:42:40.55 |
+26:11:33.4 |
HIP 21951 |
6.27 |
| 2026-06-09 12:00 |
04:43:01.37 |
+26:12:19.2 |
HIP 21951 |
2.41 |
| 2026-06-10 00:00 |
04:43:22.19 |
+26:13:04.9 |
HIP 21951 |
4.13 |
| 2026-06-10 12:00 |
04:43:43.00 |
+26:13:50.5 |
HIP 21951 |
8.54 |
| 2026-06-11 00:00 |
04:44:03.82 |
+26:14:36.1 |
HIP 21951 |
13.18 |
| 2026-06-11 12:00 |
04:44:24.64 |
+26:15:21.6 |
HIP 21951 |
17.86 |
| 2026-06-12 00:00 |
04:44:45.45 |
+26:16:07.1 |
HIP 22060 |
19.97 |
| 2026-06-12 12:00 |
04:45:06.27 |
+26:16:52.4 |
HIP 22172 |
20.86 |
| 2026-06-13 00:00 |
04:45:27.07 |
+26:17:37.7 |
HIP 22172 |
18.49 |
| 2026-06-13 12:00 |
04:45:47.88 |
+26:18:23.0 |
HIP 22172 |
17.13 |
| 2026-06-14 00:00 |
04:46:08.68 |
+26:19:08.1 |
HIP 22172 |
17.02 |
| 2026-06-14 12:00 |
04:46:29.48 |
+26:19:53.2 |
HIP 22172 |
18.18 |
| 2026-06-15 00:00 |
04:46:50.27 |
+26:20:38.2 |
HIP 22271 |
16.37 |
| 2026-06-15 12:00 |
04:47:11.05 |
+26:21:23.1 |
HIP 22271 |
14.14 |
| 2026-06-16 00:00 |
04:47:31.83 |
+26:22:08.0 |
HIP 22271 |
13.29 |
| 2026-06-16 12:00 |
04:47:52.60 |
+26:22:52.7 |
HIP 22271 |
14.07 |
| 2026-06-17 00:00 |
04:48:13.35 |
+26:23:37.4 |
HIP 22271 |
16.23 |
| 2026-06-17 12:00 |
04:48:34.10 |
+26:24:22.0 |
HIP 22271 |
19.32 |
| 2026-06-18 00:00 |
04:48:54.84 |
+26:25:06.6 |
HIP 22271 |
22.96 |
| 2026-06-18 12:00 |
04:49:15.57 |
+26:25:51.0 |
HIP 22271 |
26.93 |
| 2026-06-19 00:00 |
04:49:36.29 |
+26:26:35.4 |
HIP 22271 |
31.11 |
| 2026-06-19 12:00 |
04:49:56.99 |
+26:27:19.7 |
HIP 22600 |
34.35 |
| 2026-06-20 00:00 |
04:50:17.68 |
+26:28:03.9 |
HIP 22600 |
30.70 |
| 2026-06-20 12:00 |
04:50:38.36 |
+26:28:48.0 |
HIP 22600 |
27.36 |
| 2026-06-21 00:00 |
04:50:59.02 |
+26:29:32.0 |
HIP 22600 |
24.48 |
| 2026-06-21 12:00 |
04:51:19.67 |
+26:30:15.9 |
HIP 22600 |
22.22 |
| 2026-06-22 00:00 |
04:51:40.30 |
+26:30:59.8 |
HIP 22600 |
20.77 |