메타데이터
| 항목 |
값 |
| Designation |
C/2012 V2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-08-16T12:00:32.616000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:28Z |
| Obs used |
1054 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-03-07.0000000 |
| e |
0.99762394 |
| q (au) |
1.454756 |
| a (au) |
612.254628 |
| i (deg) |
67.184787 |
| Ω (om, deg) |
262.164771 |
| ω (w, deg) |
217.323257 |
| M (ma, deg) |
359.989428 |
밝기
산란 + 전체 선형
$$
M_a = (7.401 + 5.597\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.401 |
| n |
5.597 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.995 |
| 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 |
| 2012-10-30 |
2013-01-20 |
-3.2735 |
+1.646 |
| 2013-01-20 |
2013-03-25 |
-7.5577 |
+3.461 |
| 2013-03-25 |
2013-08-16 |
+13.2993 |
-4.446 |
| 2013-08-17 |
2013-11-06 |
+2.2763 |
-2.713 |
| 2013-11-06 |
2013-12-16 |
-9.8138 |
+1.381 |
| 2013-12-16 |
2014-05-16 |
+7.6762 |
-3.882 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
17:52:03.18 |
-12:10:49.4 |
HIP 87402 |
18.59 |
| 2026-05-12 12:00 |
17:51:59.91 |
-12:10:38.0 |
HIP 87402 |
18.55 |
| 2026-05-13 00:00 |
17:51:56.61 |
-12:10:26.7 |
HIP 87402 |
18.55 |
| 2026-05-13 12:00 |
17:51:53.30 |
-12:10:15.5 |
HIP 87402 |
18.58 |
| 2026-05-14 00:00 |
17:51:49.96 |
-12:10:04.3 |
HIP 87402 |
18.65 |
| 2026-05-14 12:00 |
17:51:46.60 |
-12:09:53.2 |
HIP 87402 |
18.75 |
| 2026-05-15 00:00 |
17:51:43.22 |
-12:09:42.2 |
HIP 87402 |
18.89 |
| 2026-05-15 12:00 |
17:51:39.82 |
-12:09:31.3 |
HIP 87402 |
19.07 |
| 2026-05-16 00:00 |
17:51:36.39 |
-12:09:20.4 |
HIP 87402 |
19.27 |
| 2026-05-16 12:00 |
17:51:32.95 |
-12:09:09.7 |
HIP 87402 |
19.52 |
| 2026-05-17 00:00 |
17:51:29.49 |
-12:08:59.0 |
HIP 87402 |
19.79 |
| 2026-05-17 12:00 |
17:51:26.00 |
-12:08:48.4 |
HIP 87402 |
20.10 |
| 2026-05-18 00:00 |
17:51:22.50 |
-12:08:37.8 |
HIP 87402 |
20.45 |
| 2026-05-18 12:00 |
17:51:18.98 |
-12:08:27.4 |
HIP 87402 |
20.82 |
| 2026-05-19 00:00 |
17:51:15.44 |
-12:08:17.0 |
HIP 87402 |
21.22 |
| 2026-05-19 12:00 |
17:51:11.88 |
-12:08:06.7 |
HIP 87402 |
21.65 |
| 2026-05-20 00:00 |
17:51:08.30 |
-12:07:56.5 |
HIP 87402 |
22.11 |
| 2026-05-20 12:00 |
17:51:04.71 |
-12:07:46.4 |
HIP 87402 |
22.60 |
| 2026-05-21 00:00 |
17:51:01.09 |
-12:07:36.4 |
HIP 87402 |
23.11 |
| 2026-05-21 12:00 |
17:50:57.46 |
-12:07:26.4 |
HIP 87402 |
23.64 |
| 2026-05-22 00:00 |
17:50:53.81 |
-12:07:16.5 |
HIP 87402 |
24.20 |
| 2026-05-22 12:00 |
17:50:50.15 |
-12:07:06.7 |
HIP 87402 |
24.77 |
| 2026-05-23 00:00 |
17:50:46.47 |
-12:06:57.0 |
HIP 87402 |
25.37 |
| 2026-05-23 12:00 |
17:50:42.77 |
-12:06:47.4 |
HIP 87402 |
25.99 |
| 2026-05-24 00:00 |
17:50:39.06 |
-12:06:37.9 |
HIP 87402 |
26.62 |
| 2026-05-24 12:00 |
17:50:35.33 |
-12:06:28.4 |
HIP 87402 |
27.28 |
| 2026-05-25 00:00 |
17:50:31.58 |
-12:06:19.1 |
HIP 87402 |
27.95 |
| 2026-05-25 12:00 |
17:50:27.83 |
-12:06:09.8 |
HIP 87402 |
28.63 |
| 2026-05-26 00:00 |
17:50:24.05 |
-12:06:00.6 |
HIP 87402 |
29.33 |
| 2026-05-26 12:00 |
17:50:20.26 |
-12:05:51.5 |
HIP 87402 |
30.05 |
| 2026-05-27 00:00 |
17:50:16.46 |
-12:05:42.5 |
HIP 87402 |
30.77 |
| 2026-05-27 12:00 |
17:50:12.65 |
-12:05:33.6 |
HIP 87268 |
31.28 |
| 2026-05-28 00:00 |
17:50:08.82 |
-12:05:24.8 |
HIP 87268 |
31.31 |
| 2026-05-28 12:00 |
17:50:04.98 |
-12:05:16.0 |
HIP 87268 |
31.37 |
| 2026-05-29 00:00 |
17:50:01.12 |
-12:05:07.4 |
HIP 87268 |
31.46 |
| 2026-05-29 12:00 |
17:49:57.25 |
-12:04:58.8 |
HIP 87268 |
31.58 |
| 2026-05-30 00:00 |
17:49:53.38 |
-12:04:50.3 |
HIP 87268 |
31.72 |
| 2026-05-30 12:00 |
17:49:49.48 |
-12:04:41.9 |
HIP 87268 |
31.89 |
| 2026-05-31 00:00 |
17:49:45.58 |
-12:04:33.6 |
HIP 87268 |
32.09 |
| 2026-05-31 12:00 |
17:49:41.67 |
-12:04:25.4 |
HIP 87268 |
32.31 |
| 2026-06-01 00:00 |
17:49:37.74 |
-12:04:17.3 |
HIP 87268 |
32.56 |
| 2026-06-01 12:00 |
17:49:33.80 |
-12:04:09.3 |
HIP 87268 |
32.83 |
| 2026-06-02 00:00 |
17:49:29.86 |
-12:04:01.4 |
HIP 87268 |
33.13 |