메타데이터
| 항목 |
값 |
| Designation |
479P/Elenin |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-05T07:27:38.416320Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:26Z |
| Obs used |
990 |
| NEO |
Yes |
| M1 |
16.200 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-18T13:30:33.264000Z |
| Discovery magnitude (MPC) |
21.79 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-03-04.0000000 |
| e |
0.77856369 |
| q (au) |
1.244472 |
| a (au) |
5.619998 |
| i (deg) |
15.393352 |
| Ω (om, deg) |
295.845766 |
| ω (w, deg) |
263.493717 |
| M (ma, deg) |
328.314623 |
밝기
산란 + 전체 선형
$$
M_a = (15.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.000 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.637 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
| 2023-10-17 |
2024-05-04 |
+6.0878 |
-1.609 |
| 2024-05-05 |
2024-08-05 |
+11.6597 |
-2.541 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
22:52:48.99 |
+03:31:30.3 |
HIP 112950 |
4.34 |
| 2026-03-26 12:00 |
22:53:06.80 |
+03:33:51.0 |
HIP 112950 |
8.50 |
| 2026-03-27 00:00 |
22:53:24.56 |
+03:36:11.7 |
HIP 112950 |
13.26 |
| 2026-03-27 12:00 |
22:53:42.26 |
+03:38:32.4 |
HIP 112950 |
18.14 |
| 2026-03-28 00:00 |
22:53:59.91 |
+03:40:53.1 |
HIP 112950 |
23.06 |
| 2026-03-28 12:00 |
22:54:17.50 |
+03:43:13.8 |
HIP 112993 |
26.91 |
| 2026-03-29 00:00 |
22:54:35.04 |
+03:45:34.5 |
HIP 112993 |
28.77 |
| 2026-03-29 12:00 |
22:54:52.52 |
+03:47:55.3 |
HIP 112993 |
31.30 |
| 2026-03-30 00:00 |
22:55:09.95 |
+03:50:16.0 |
HIP 113041 |
33.50 |
| 2026-03-30 12:00 |
22:55:27.32 |
+03:52:36.7 |
HIP 113275 |
30.78 |
| 2026-03-31 00:00 |
22:55:44.63 |
+03:54:57.3 |
HIP 113275 |
27.13 |
| 2026-03-31 12:00 |
22:56:01.88 |
+03:57:18.0 |
HIP 113275 |
23.94 |
| 2026-04-01 00:00 |
22:56:19.08 |
+03:59:38.6 |
HIP 113275 |
21.41 |
| 2026-04-01 12:00 |
22:56:36.21 |
+04:01:59.3 |
HIP 113360 |
19.44 |
| 2026-04-02 00:00 |
22:56:53.29 |
+04:04:19.8 |
HIP 113360 |
18.55 |
| 2026-04-02 12:00 |
22:57:10.31 |
+04:06:40.4 |
HIP 113360 |
18.91 |
| 2026-04-03 00:00 |
22:57:27.26 |
+04:09:00.9 |
HIP 113360 |
20.45 |
| 2026-04-03 12:00 |
22:57:44.16 |
+04:11:21.4 |
HIP 113360 |
22.92 |
| 2026-04-04 00:00 |
22:58:00.99 |
+04:13:41.8 |
HIP 113513 |
20.93 |
| 2026-04-04 12:00 |
22:58:17.76 |
+04:16:02.2 |
HIP 113513 |
16.19 |
| 2026-04-05 00:00 |
22:58:34.46 |
+04:18:22.5 |
HIP 113513 |
11.51 |
| 2026-04-05 12:00 |
22:58:51.11 |
+04:20:42.7 |
HIP 113513 |
6.97 |
| 2026-04-06 00:00 |
22:59:07.69 |
+04:23:02.9 |
HIP 113513 |
3.18 |
| 2026-04-06 12:00 |
22:59:24.20 |
+04:25:23.1 |
HIP 113513 |
4.08 |
| 2026-04-07 00:00 |
22:59:40.65 |
+04:27:43.2 |
HIP 113513 |
8.24 |
| 2026-04-07 12:00 |
22:59:57.04 |
+04:30:03.1 |
HIP 113513 |
12.78 |
| 2026-04-08 00:00 |
23:00:13.36 |
+04:32:23.1 |
HIP 113513 |
17.39 |
| 2026-04-08 12:00 |
23:00:29.61 |
+04:34:42.9 |
HIP 113699 |
18.75 |
| 2026-04-09 00:00 |
23:00:45.79 |
+04:37:02.6 |
HIP 113699 |
16.30 |
| 2026-04-09 12:00 |
23:01:01.91 |
+04:39:22.3 |
HIP 113699 |
14.96 |
| 2026-04-10 00:00 |
23:01:17.96 |
+04:41:41.9 |
HIP 113699 |
14.99 |
| 2026-04-10 12:00 |
23:01:33.93 |
+04:44:01.3 |
HIP 113699 |
16.39 |
| 2026-04-11 00:00 |
23:01:49.84 |
+04:46:20.7 |
HIP 113699 |
18.84 |
| 2026-04-11 12:00 |
23:02:05.68 |
+04:48:39.9 |
HIP 113832 |
17.14 |
| 2026-04-12 00:00 |
23:02:21.45 |
+04:50:59.1 |
HIP 113832 |
12.59 |
| 2026-04-12 12:00 |
23:02:37.14 |
+04:53:18.1 |
HIP 113832 |
8.08 |
| 2026-04-13 00:00 |
23:02:52.77 |
+04:55:37.0 |
HIP 113832 |
3.65 |
| 2026-04-13 12:00 |
23:03:08.32 |
+04:57:55.8 |
HIP 113832 |
1.54 |
| 2026-04-14 00:00 |
23:03:23.79 |
+05:00:14.4 |
HIP 113832 |
5.65 |
| 2026-04-14 12:00 |
23:03:39.19 |
+05:02:32.9 |
HIP 113832 |
10.08 |
| 2026-04-15 00:00 |
23:03:54.52 |
+05:04:51.3 |
HIP 113832 |
14.52 |
| 2026-04-15 12:00 |
23:04:09.77 |
+05:07:09.5 |
HIP 113978 |
13.16 |
| 2026-04-16 00:00 |
23:04:24.95 |
+05:09:27.6 |
HIP 113978 |
8.85 |